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Study Protocol
Revised

Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study

[version 3; peer review: 2 approved]
Previously titled: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and an expert survey
PUBLISHED 02 Sep 2021
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Abstract

Background: Up-to-date guidance on comprehensive study identification for systematic reviews is crucial. According to current recommendations, systematic searching should combine electronic database searching with supplementary search methods. One such supplementary search method is citation tracking. It aims at collecting directly and/or indirectly cited and citing references from "seed references". Tailored and evidence-guided recommendations concerning the use of citation tracking are strongly needed.
Objective: We intend to develop recommendations for the use of citation tracking in systematic literature searching for health-related topics. Our study will be guided by the following research questions: What is the benefit of citation tracking for systematic literature searching for health-related topics? Which methods, citation indexes, and other tools are used for citation tracking? What terminology is used for citation tracking methods?
Methods: Our study will have two parts: a scoping review and a Delphi study. The scoping review aims at identifying methodological studies on the benefit and use of citation tracking in systematic literature searching for health-related topics with no restrictions on study design, language, and publication date. We will perform database searching in MEDLINE (Ovid), CINAHL (EBSCOhost), Web of Science Core Collection, two information science databases, web searching, and contact experts in the field. Two reviewers will independently perform study selection. We will conduct direct backward and forward citation tracking on included articles. Data from included studies will be extracted using a prespecified extraction sheet and presented in both tabular and narrative form. The results of the scoping review will inform the subsequent Delphi study through which we aim to derive consensus recommendations for the future practice and research of citation tracking.

Keywords

Citation Tracking, Literature Search, Supplementary Search, Methods, Scoping Review, Research Methodology, Survey, Systematic Review

Revised Amendments from Version 2

We added methodological details of the Delphi study and we now specify the number of rounds we expect to perform, the consensus rate, anonymity of participants, and expected non-response.

See the authors' detailed response to the review by Julie Glanville
See the authors' detailed response to the review by David Moher

Introduction

Systematic reviews are considered to be of high clinical and methodological importance as they help to derive recommendations for health care practice and future research13. A comprehensive literature search that aims to identify the available evidence as completely as possible is the foundation of every systematic review46. Due to an ever-growing research volume, lack of universal terminology and indexation, as well as extensive time requirements for identifying studies in a systematic way, efficient search approaches are required5,7,8. According to current recommendations, systematic search approaches should include both electronic database searching and one or several supplementary search methods9. Potential supplementary search methods include citation tracking, contacting study authors or experts, handsearching, trial register searching, and web searching10. In this study, we focus on citation tracking.

Citation tracking is an umbrella term for multiple methods which directly or indirectly collect related references from so called "seed references". These seed references are usually eligible for inclusion into the review. Some may be known at the beginning of the review and others may emerge as eligible records following full-text screening1012. The terminology used to describe the principles of citation tracking is non-uniform and heterogeneous1316. Citation tracking methods are sub-categorized into direct and indirect citation tracking (Figure 1a). For direct citation tracking, the words "backward" and "forward" denote the directionality of tracking13,17,18. Backward citation tracking is the oldest form of citation tracking. It aims at identifying references cited by a seed reference - which can easily be achieved by checking the reference list. Terms like "footnote chasing" or "reference list searching" are synonyms6,13. In contrast, forward citation tracking or chaining aims at identifying citing references, i.e. references that cite a seed reference19. Indirect citation tracking describes the identification of (i) co-cited references or co-citations (i.e. other references cited by citing literature of a seed reference) and of (ii) co-citing references (i.e. publications sharing references with a seed reference)11,20. Direct and indirect citation relationships of references based on a seed reference are illustrated in Figure 1b. Both direct and indirect citation tracking may contain one or more layers of iteration. To this end, researchers may use newly retrieved, relevant references as new seed references.

8f82bbd2-b656-406a-a7e0-4899c1479ef3_figure1.gif

Figure 1. Overview of citation tracking methods.

1a: Hierarchical illustration of different citation tracking methods; 1b: Direct and indirect citation relationships of references based on a seed reference. A → B denotes A cites B. The horizontal axis denotes time, i.e. the chronology in which references were published relative to the seed reference: “Older” stands for references that were published before the seed reference, “Newer” stands for references that were published after the seed reference.

Direct backward citation tracking of cited references is currently the most common citation tracking method. However, recent guidance suggests that a combination of several methods (e.g., tracking cited, citing, co-cited and co-citing references) may be the most effective way to use citation tracking for systematic reviewing10. It is quite likely that the added value of any form of citation tracking is not the same for all systematic reviews. It rather depends on a variety of factors. For instance, citation tracking may be beneficial in research areas that require complex searches such as reviews of complex interventions, mixed-methods reviews, qualitative evidence syntheses, or reviews on public health topics. Furthermore, research areas without consistent terminology or with vocabulary overlaps with other fields, such as methodological topics, may also benefit from the use of citation tracking20,21. Hence, tailored and evidence-guided recommendations on the use of citation tracking are strongly needed. However, none of the current reviews on this topic has systematically identified available evidence on the use and benefit of citation tracking in the context of systematic literature searching10.

Therefore, the aim of our study is to develop recommendations for the use of citation tracking in systematic literature searching for health-related topics. The scoping review will be guided by the following three research questions which in turn will inform the Delphi study:

  • What is the benefit of citation tracking for systematic literature searching for health-related topics?

  • Which methods, citation indexes, and other tools are used for citation tracking?

  • What terminology is used for citation tracking methods?

Protocol

This protocol is reported according to the “Preferred Reporting Items for Systematic review and Meta-Analysis Protocols” (PRISMA-P) checklist22 which we published on the Open Science Framework23. Our study will have two parts: a scoping review and a Delphi study. The scoping review has the objective to map the benefit and the use of citation tracking, or research gaps if the results are not sufficiently informative. The objective of the subsequent Delphi study is to derive consensus recommendations for future practice and research of citation tracking2426. For the scoping review, we will use the framework by Arksey and O’Malley26 and the “Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews” (PRISMA-ScR)27. For the Delphi study, we will follow the “Guidance on Conducting and REporting DElphi Studies” (CREDES) statement28.

Scoping review

Eligibility criteria. We will include any study with a focus on citation tracking as a means of evidence retrieval which exhibits one of the following criteria: benefit and/or effectiveness of (i) citation tracking in general; (ii) different methods of citation tracking (e.g., backward vs. forward, direct vs. indirect); or (iii) technical uses of citation tracking (e.g., comparing citation indexes and/or tools, e.g., Scopus vs. Web of Science, Oyster, Voyster). Eligible studies need to have a health-related context. There will be no restrictions on study design, language, and publication date.

We will exclude studies solely using citation tracking for evidence retrieval, e.g., a systematic review applying citation tracking as a supplementary search technique, or studies focussing on citation tracking as a means to explore network or citation impact (i.e. bibliometric analysis). Studies only assessing the benefit of combined search methods in which the isolated benefit of citation tracking cannot be extracted will also be excluded. Furthermore, we will exclude methodological guidelines without empirical investigations and other non-empirical publications like editorials, commentaries, letters and abstract-only publications. Table 1 illustrates our inclusion and exclusion criteria per domain.

Table 1. Inclusion and exclusion criteria.

DomainInclusion criteriaExclusion criteria
Study focusAny study with a focus on citation tracking as
an evidence retrieval method
AND
one of the following criteria:
- any study assessing the benefit and/or
effectiveness of citation tracking
- any study comparing different methods of
citation tracking (e.g., backward vs. forward,
direct vs. indirect)
- any study assessing technical uses of citation
tracking (e.g., comparing citation indexes and/or
tools, e.g., Scopus vs. WoS, Oyster, Voyster, etc.)
Any study solely using citation tracking for evidence retrieval (e.g., a
systematic review applying citation tracking as supplementary search
technique)
OR
any study solely assessing benefits and/or use and/or effectiveness of
citation tracking to explore a network or citation impact (i.e. bibliometric
analysis)
OR
any study describing solely the method of citation tracking without
further assessing it, e.g., guidelines for developing search strategies or
guidelines for systematic or other reviews
OR
any study only assessing the benefit of combined search methods in
which the isolated benefit of citation tracking cannot be extracted
Research
context
Health-relatedOther
LanguageAll languages-
Publication
year
All publication years-
Publication
type
Any reports of empirical studiesEditorials
Commentaries
Letters
Abstract-only publications

Information sources. We will search MEDLINE via Ovid; CINAHL (Cumulative Index to Nursing and Allied Health Literature), LLISFT (Library Literature & Information Science Full Text) and LISTA (Library, Information Science & Technology Abstracts) via EBSCOhost, and the Web of Science Core Collection by using database-specific search strategies. Additionally, we will perform web searching via Google Scholar as well as direct forward and backward citation tracking of included studies. As some evidence suggests that one citation index may not be enough for this29, we will use Scopus, Web of Science, and Google Scholar for forward citation tracking. For backward citation tracking, we will use Scopus and, if seed references are not indexed in Scopus, we will manually extract the seed reference's reference list. We will iteratively repeat direct citation tracking on newly identified eligible references until no further eligible references will be identified. We will also contact librarians in the field of health sciences and information specialists through several mailing lists (Canadian Medical Libraries, Expertsearching, MEDIBIB-L/German-speaking medical librarians, and EAHIL-list) to ask for further studies.

Search strategy. Due to a lack of adequate index terms, our search strategy will be based on text words only. To determine frequently occurring terms for inclusion into the search strategy, we analysed keywords in the titles and abstracts of potentially relevant publications retrieved from preliminary searches and similar articles identified via PubMed by using various text mining tools (PubMed Reminer, AntConc, Yale MeSH analyzer, Voyant, VOSviewer, Termine, Text analyzer)30. We restricted some of our text words to the title field in order to avoid retrieving systematic reviews that used citation tracking.

All authors contributed to the development of search strategies. HE and CAH are information specialists with a professional background in research; JH and TN are researchers experienced in the development of search strategies. HE drafted the search strategy and JH peer-checked it.

Box 1 shows the final search for MEDLINE in Ovid syntax. To use the search in other databases, we will translate it by means of Polyglot Search Translator31. CAH will conduct the searches and eliminate duplicates using the Bramer method32. We will perform web searching in Google Scholar using search terms from our database search. We will document our search strategy according to PRISMA-S33.

Box 1. Search strategy for MEDLINE via Ovid

(reference list OR reference lists OR ((reference OR references OR citation OR citations OR co-citation OR co-citations) ADJ3 (search OR searches OR searching OR searched OR screen OR screening OR chain OR chains OR chaining OR check OR checking OR checked OR chased OR chasing OR tracking OR tracked OR harvesting OR tool OR tools OR backward OR forward)) OR ((cited OR citing OR cocited OR cociting OR co-cited OR co-citing) ADJ3 (references OR reference)) OR citation discovery tool OR cocitation OR co-citation OR cocitations OR co-citations OR co-cited OR backward chaining OR forward chaining OR snowball sampling OR snowballing OR footnote chasing OR berry picking OR cross references OR cross referencing OR cross-references OR cross-referencing OR citation activity OR citation activities OR citation analysis OR citation analyses OR citation network OR citation networks OR citation relationship OR citation relationships).ti OR (((((strategy OR strategies OR method* OR literature OR evidence OR additional OR complementary OR supplementary) ADJ3 (find OR finding OR search* OR retriev*)) OR (database ADJ2 combin*)).ti) AND ((search OR searches OR searching OR searched).ab))

Data management. A bibliography management tool will be used to manage the number of reference retrievals throughout the study selection process. Furthermore, we will use specific tools for study selection that we describe below.

Selection of sources of evidence. After an initial calibration phase, that is screening 100 titles and abstracts separately and discussing divergent decisions (TN, JH, HE), two authors (JH, TN) will independently screen titles, abstracts, and full texts using Rayyan34. They will solve disagreements by third author arbitration (HE). To screen the results of the citation tracking step, we will consider ASReview, particularly if the number of references exceeds 1000. ASReview combines machine (deep) learning models on a set of eligible studies with active learning on manual selections during title-abstract screening to generate a relevancy-ranked abstract list and to save screening time. Should the tool prove to be beneficial for reducing the screening load, we will consider conducting a more sensitive database search at a later stage and screen additional results with ASReview.

Data charting process. We will pilot a prespecified data extraction sheet approved by consensus among the authors. We will extract bibliographic and geographic data, design- and study-specific data as well as results that answer our research questions. Since we expect heterogeneous studies in terms of aim, design, and methods, we aim for an iterative data extraction process. This will allow a flexible and study-specific data extraction process, e.g., by adding previously neglected data extraction items that might contribute to the overall body of knowledge to the data extraction form. In the final publication, we will provide a detailed overview of extracted data items. One author will extract data and a second author will peer-check the extraction. We will solve disagreements by third author arbitration.

Synthesis of results. One author (JH) will narratively summarise study characteristics and results. Depending on the results, we will also chart them graphically.

Delphi study

Design and rationale. A consensus multi-stage online Delphi procedure will be used to derive recommendations for the use of citation tracking in systematic literature searching for health-related topics28,35,36. A Delphi procedure will be chosen since the method enables to collect the perspectives of international experts on citation tracking, promote discussions on the topic as well as derive consensus recommendations for future practice and research. The Delphi study will entail several Delphi rounds (see below). The results of the scoping review will inform the initial Delphi round (see below for details). To distribute the Delphi rounds to the experts, we will use the web-based tool SosciSurvey37. The Delphi language will be English.

Expert panel. The recruitment of experts will be based on a stepwise approach. First, we will contact authors of pertinent articles identified during the literature search as well as experts from our professional networks. This "person-based" approach will help us to identify experts who authored papers, books, comments, and reviews in the field of citation tracking. We will ask the contacted persons to take part in the Delphi study. Second, we will identify and contact relevant national and international organisations as well as systematic review collaborations (e.g., Cochrane groups, Joanna Briggs Institute (JBI), Campbell Collaboration, National Academy of Medicine (NAM), expert information specialists, Evidence Synthesis International, and PRISMA-S working group). This "organisation-based approach" will allow us to reach experts in the field of literature retrieval methods who are potentially using citation tracking without necessarily being the authors of methodological studies (yet). By using this stepwise approach, we intend to recruit at least 15 experts.

Data collection. In online Delphi rounds, we will seek guidance on various aspects of citation tracking. For example, recommendations on the following aspects could be of particular interest:

  • Uniform terminology for citation tracking methods

  • Situations in which citation tracking should be applied

  • Potential situations in which citation tracking can be used as a sole method of evidence retrieval

  • Situations in which a particular citation tracking method or a combination thereof is likely to be most effective

  • Situations in which further layers of iteration of citation tracking should be applied

  • Necessity to use multiple citation indexes for citation tracking

  • For indirect citation tracking, screening of selected records only and definition of their ranking and cut-off

  • Reporting of citation tracking (complementing PRISMA-S33)

  • Questions on citation tracking that currently cannot be answered and require more research

Based on the results of our scoping review, we will formulate draft recommendations for the first Delphi round. Experts will be invited to rate their agreement with the draft recommendations using a four-point Likert scale (strongly agree – agree – disagree – strongly disagree). If experts vote disagree/strongly disagree, they will be required to comment on their reasons and/or give constructive feedback. We consider a recommendation as consented when at least 75% of the experts agree/strongly agree. All other recommendations will be adapted for the next Delphi round. This adaptation will be based on the comments collected from the experts and, if necessary, on discussion via video conference.

There are items where we will not directly propose recommendations, e.g., if the results of our scoping review do not allow it or if there are several equally valid options (e.g., for terminology). In these cases, we will either ask the Delphi experts for their experiences and perspectives or let them vote on several options. We will use the resulting answers to formulate draft recommendations, which will be entered into the Delphi consensus process (see above). Therefore, our Delphi study may comprise qualitative and quantitative aspects.

We will limit the number of Delphi rounds to a maximum of four rounds. Should there be no consensus for any of the items by the end of the fourth round, we will report the results but not give any recommendations.

Expert assessments will be anonymous among experts but open to the study team. We expect a low non-response rate since experts' participation is indicative of their interest in our study.

To describe experts’ characteristics, we will collect sociodemographic data, i.e. professional education and background, current field of work as well as years of experience in literature searching and citation tracking. We expect that experts will invest around 30 to 90 minutes per Delphi round depending on the underpinning aim of the Delphi round as well as experts’ familiarity and experiences with the topic. For each Delphi round, we will schedule approximately three weeks for participation. Table 2 illustrates our reminder strategy within a Delphi round. We will pilot test and discuss our Delphi items with a person experienced in literature searching who is not an author and not involved in the Delphi study.

Table 2. Reminder strategy of each online Delphi round.

Process and
time
Person-based
approach
Organisation-based
approach
Delphi round setupInvitationInvitation
One week afterReminder-
Two weeks afterReminderReminder
Delphi round closing
after three weeks
--

Note: Person-based approach: contacting authors of pertinent articles identified during the literature search as well as experts from authors’ professional networks; Organisation-based approach: contacting national and international organisations and systematic review collaborations.

Data analysis. We will use descriptive statistics for votes for which results are numeric or can be converted into numbers. For free text answers and statements of experts, we will use thematic categorisation38.

Ethical concerns. The online Delphi study will contain introductory information on our aims, the Delphi itself, data management and security. We do not expect vulnerability on the part of experts and with regard to the Swiss Human Research Act, our research does not concern human diseases and the structure and function of the human body39. We will therefore not apply for ethical approval of the Delphi study. Taking part in the Delphi study will indicate consent to participate. There will be no mandatory participation once an expert consented to participate. Experts will not receive an incentive for participation and may leave the process at any time.

Dissemination of results

Our dissemination strategy uses multiple ways to share our study results with academic stakeholders. The final scoping review and Delphi study will each be published in an international open access journal relevant in the field of information retrieval. Additionally, we will discuss our results with experts at national and international conferences (e.g., conference of the German Network for Evidence-based Medicine (EbM-Netzwerk), conference of the European Association for Health Information and Libraries (EAHIL), Cochrane Colloquium, Health Technology Assessment International (HTAi) conference). To inform about our study results and publications, we will use Twitter, ResearchGate, and mailing lists from relevant stakeholders such as Canadian Medical Libraries, Expertsearching, MEDIBIB-L/German-speaking medical librarians, and EAHIL-list.

Study status

We conducted the initial search for the scoping review in November 2020 and expect to complete the Delphi study in 2022.

Current study status: literature searches: yes; piloting of the study selection process: yes; formal screening of search results against eligibility criteria: yes; data extraction: no; data analysis: no.

Conclusions

Missing pertinent evidence might have an impact on the validity of systematic reviews and, consequently, on the quality of health care40,41. Therefore, authors of systematic reviews should conduct high quality literature searches aiming to detect all relevant evidence. Citation tracking may be an effective way to complement electronic database searches and to broaden the scope of possible findings. Therefore, our study intends to provide literature- and expert-based recommendations on the use of citation tracking for systematic literature searching. Although we solely focus on a health-related context, it is possible that some of the recommendations developed during this project may prove relevant also for other academic fields such as social or environmental sciences9,42. Finally, tailored and evidence-based recommendations concerning the use of citation tracking for systematic literature searching may guide future steps in semi-automated and automated literature retrieval methods43,44.

Data availability

Underlying data

No underlying data are associated with this article.

Reporting guidelines

Open Science Framework (OSF): PRISMA-P checklist for ‘Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study’, https://doi.org/10.17605/OSF.IO/7ETYD23.

Data are available under the terms of the Creative Commons Zero "No rights reserved" data waiver (CC0 1.0 Public domain dedication).

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Hirt J, Nordhausen T, Appenzeller-Herzog C and Ewald H. Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.12688/f1000research.27337.3)
NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article.
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ApprovedThe paper is scientifically sound in its current form and only minor, if any, improvements are suggested
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Not approvedFundamental flaws in the paper seriously undermine the findings and conclusions
Version 3
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PUBLISHED 02 Sep 2021
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Reviewer Report 23 Sep 2021
David Moher, School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada;  Centre for Journalology, Ottawa Hospital Research Institute, Ottawa, Canada 
Approved
VIEWS 20
The authors have addressed the concerns ... Continue reading
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Moher D. Reviewer Report For: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.5256/f1000research.77208.r93320)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
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PUBLISHED 04 Aug 2021
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Reviewer Report 18 Aug 2021
Julie Glanville, Cochrane Information Retrieval Methods Group, London, UK 
Approved
VIEWS 14
I have read the revised version of the study protocol ... Continue reading
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Glanville J. Reviewer Report For: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.5256/f1000research.55984.r91228)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
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Reviewer Report 18 Aug 2021
David Moher, School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada;  Centre for Journalology, Ottawa Hospital Research Institute, Ottawa, Canada 
Approved with Reservations
VIEWS 26
I think the revisions, particularly around the scoping review, are much improved.

In terms of the Delphi study, I think details are still missing. For example, it is unclear how many rounds will be given. After round ... Continue reading
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HOW TO CITE THIS REPORT
Moher D. Reviewer Report For: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.5256/f1000research.55984.r91227)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
  • Author Response 02 Sep 2021
    Julian Hirt, International Graduate Academy, Institute of Health and Nursing Science, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
    02 Sep 2021
    Author Response
    Dear David Moher
    Thank you very much for your helpful comments and references. We revised our manuscript with respect to methodological details of the Delphi study and now specified the
    ... Continue reading
COMMENTS ON THIS REPORT
  • Author Response 02 Sep 2021
    Julian Hirt, International Graduate Academy, Institute of Health and Nursing Science, Medical Faculty, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
    02 Sep 2021
    Author Response
    Dear David Moher
    Thank you very much for your helpful comments and references. We revised our manuscript with respect to methodological details of the Delphi study and now specified the
    ... Continue reading
Version 1
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PUBLISHED 01 Dec 2020
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Reviewer Report 07 Apr 2021
David Moher, School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada;  Centre for Journalology, Ottawa Hospital Research Institute, Ottawa, Canada 
Approved with Reservations
VIEWS 28
The authors are proposing a new guidance on citation tracking. They will achieve this by completing a scoping review and subsequently a survey. The authors propose using appropriate methods (and reporting) for conducting the scoping review. I found the methods ... Continue reading
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HOW TO CITE THIS REPORT
Moher D. Reviewer Report For: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.5256/f1000research.30208.r81307)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
  • Author Response 04 Aug 2021
    Julian Hirt, Institute of Applied Nursing Science, Department of Health, Eastern Switzerland University of Applied Sciences (formerly FHS St.Gallen), St.Gallen, Switzerland
    04 Aug 2021
    Author Response
    Dear David Moher

    We are grateful for your reviewer report and, in particular, for your helpful suggestions to derive evidence-based recommendations from our study. Below, we provide a detailed ... Continue reading
COMMENTS ON THIS REPORT
  • Author Response 04 Aug 2021
    Julian Hirt, Institute of Applied Nursing Science, Department of Health, Eastern Switzerland University of Applied Sciences (formerly FHS St.Gallen), St.Gallen, Switzerland
    04 Aug 2021
    Author Response
    Dear David Moher

    We are grateful for your reviewer report and, in particular, for your helpful suggestions to derive evidence-based recommendations from our study. Below, we provide a detailed ... Continue reading
Views
50
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Reviewer Report 05 Jan 2021
Julie Glanville, Cochrane Information Retrieval Methods Group, London, UK 
Approved with Reservations
VIEWS 50
The authors propose to conduct a scoping review of the use of citation tracking techniques to identify research evidence to inform systematic reviews and also to survey experts on their use of citation tracking.
 
My suggestions for ... Continue reading
CITE
CITE
HOW TO CITE THIS REPORT
Glanville J. Reviewer Report For: Using citation tracking for systematic literature searching - study protocol for a scoping review of methodological studies and a Delphi study [version 3; peer review: 2 approved]. F1000Research 2021, 9:1386 (https://doi.org/10.5256/f1000research.30208.r76282)
NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article.
  • Author Response 04 Aug 2021
    Julian Hirt, Institute of Applied Nursing Science, Department of Health, Eastern Switzerland University of Applied Sciences (formerly FHS St.Gallen), St.Gallen, Switzerland
    04 Aug 2021
    Author Response
    Dear Julie Glanville

    We are grateful for your reviewer report and, in particular, for your helpful suggestions for improvement of our scoping review protocol. Below, we provide a detailed ... Continue reading
COMMENTS ON THIS REPORT
  • Author Response 04 Aug 2021
    Julian Hirt, Institute of Applied Nursing Science, Department of Health, Eastern Switzerland University of Applied Sciences (formerly FHS St.Gallen), St.Gallen, Switzerland
    04 Aug 2021
    Author Response
    Dear Julie Glanville

    We are grateful for your reviewer report and, in particular, for your helpful suggestions for improvement of our scoping review protocol. Below, we provide a detailed ... Continue reading

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Version 3
VERSION 3 PUBLISHED 01 Dec 2020
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Alongside their report, reviewers assign a status to the article:
Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested
Approved with reservations - A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit.
Not approved - fundamental flaws in the paper seriously undermine the findings and conclusions
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