Canelo-Aybar, Carlos http://orcid.org/0000-0002-0844-4365
Posso, Margarita
Montero, Nadia
Solà, Ivan
Saz-Parkinson, Zuleika http://orcid.org/0000-0002-3518-5899
Duffy, Stephen W. http://orcid.org/0000-0003-4901-7922
Follmann, Markus
Gräwingholt, Axel
Giorgi Rossi, Paolo
Alonso-Coello, Pablo
Funding for this research was provided by:
European Commission
Article History
Received: 9 October 2020
Revised: 20 June 2021
Accepted: 30 July 2021
First Online: 26 November 2021
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: Zuleika Saz Parkinson was an employee of the Joint Research Centre, European Commission when this systematic review was carried out. Carlos Canelo-Aybar, Margarita Posso, Ivan Solà and Pablo Alonso-Coello are employees of the Iberoamerican Cochrane Collaboration. Stephen W. Duffy, Markus Follmann, Axel Gräwingholt and Paolo Giorgi Rossi are GDG members of the ECIBC guidelines.