Article History
Received: 12 September 2019
Accepted: 14 July 2020
First Online: 24 July 2020
Ethics approval and consent to participate
: No sensitive data were involved in this analysis. Therefore, no ethical approval was needed for Institutional review.
: Not applicable.
: The author Valentina Lorenzoni is an Associate editor of the BMC Health Services Research. The rest of the authors have no competing interests.