Article info
PDFResearch methods
Original research
Extent and nature of duplication in PROSPERO using COVID-19-related registrations: a retrospective investigation and survey
- Correspondence to Ms Ruth Walker; ruth.walker{at}york.ac.uk
Citation
Extent and nature of duplication in PROSPERO using COVID-19-related registrations: a retrospective investigation and survey
Publication history
- Received February 15, 2022
- Accepted November 16, 2022
- First published December 1, 2022.
Online issue publication
December 01, 2022
Supplementary Data
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY. Published by BMJ. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.