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Article History

Accepted: 31 March 2021

First Online: 20 April 2021

Declarations

:

: No specific funding for this study. We would like to thank Veritas Health Innovation for granting us free access to the COVIDENCE software for this study under the COVID-19 team initiative. DJP was supported by a grant from the Spanish Ministry of Science and Innovation—MINECO (RYC-2014-16938).

: Sebastien F. M. Chastin, Ukachukwu Abaraogu, Jan G. Bourgois, Philippa M. Dall, Jennifer Darnborough, Elain Duncan, Jasmien Dumortier, David Jiménez Pavón, Joanna McParland, Nicola J. Roberts and Mark Hamer declare that they have no conflicts of interest relevant to the content of this review.

: Not applicable.

: Not applicable.

: Not applicable.

: Not applicable.

: The datasets generated during and/or analysed during the current review are available from the corresponding author on reasonable request.

: Substantial contributions to the conception or design of the work (SC, UA, and MH); acquisition of the data (all authors); data extraction (all authors); statistical analyses (SC); interpretation of the data (all authors); drafting the work (SC, MH, JB, JD); revising it critically for important intellectual content (all authors); final approval of the version to be published (all authors); agreement to be accountable for all aspects of the work (all authors). The corresponding author attests that all listed authors meet authorship criteria and that no others meeting the criteria have been omitted.