Funding for this research was provided by:
IMSS Fund for the Promotion of Health Research (FIS/IMSS/PROT/G17-211759)
Received: 14 May 2020
Accepted: 1 July 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: The study was approved by the IMSS National Research and Ethics Committee (registry number R-2017-785-042). Prior to each interview, participants received information about the aims and nature of the study and relevant ethical considerations. All invited participants agreed to participate and signed an informed consent form.
: Not applicable.
: One of the authors SVD is an Associate Editor of BMC Health Services Research.