Funding for this research was provided by:
Campbell Collaboration (N/A)
Text and Data Mining valid from 2020-01-17
Received: 30 November 2018
Accepted: 12 September 2019
First Online: 17 January 2020
Ethics approval and consent to participate
: Not applicable. This study did not undertake any formal data collection involving humans or animals. Participants in the informal focus group discussion provided verbal consent to participate. According to the Norwegian Centre for Research Data (nsd.no) online portal for determining registration of studies, this study did not warrant application for review by an ethical committee ExternalRef removed.
: Not applicable.
: HMK, CG and SL are co-authors of the GRADE-CERQual approach and lead co-ordinators of the GRADE-CERQual coordinating group. HN has no competing interests.