Funding for this research was provided by:
Received: 11 May 2020
Accepted: 24 August 2021
First Online: 5 October 2021
: I.J.J.A. is Senior Vice-President of Research Integrity for Elsevier. M.M. is a Co-Editor-in-Chief of BMC’s Research Integrity and Peer Review journal. G.t.R. was an author of one study included in this review<sup>49</sup>, however the inclusion of the study in the review, as well as data extraction and analysis were conducted by M.M. and A.J. The remaining authors declare no competing interests.