Extent and nature of duplication in PROSPERO using COVID-19-related registrations: a retrospective investigation and survey | BMJ Open

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Extent and nature of duplication in PROSPERO using COVID-19-related registrations: a retrospective investigation and survey

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Cite this article as:: Beresford L, Walker R, Stewart L

Extent and nature of duplication in PROSPERO using COVID-19-related registrations: a retrospective investigation and survey

BMJ Open 2022;12:e061862. doi: 10.1136/bmjopen-2022-061862