Funding for this research was provided by:
Tehran University of Medical Sciences and Health Services
Received: 4 May 2020
Accepted: 28 July 2020
First Online: 12 January 2021
Ethics approval and consent to participate
: The study protocol has been approved by the Ethics Committee for Research at Tehran University of Medical Sciences. Informed consents will be also obtained from key informants; data will be collected anonymously to maintain utmost confidentiality.
: Not applicable.
: The authors declare that they have no competing interests.