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Ranking of journals by journal impact factors is not exact and may provoke misleading conclusions

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  • Handling editor Tahir S Pillay.

  • Contributors KM contributed to conceptualisation; data curation; formal analysis; investigation; methodology; project administration; supervision; validation; writing-original draft; writing-review & editing. FABdS contributed to conceptualisation; data curation; investigation; methodology.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.