Funding for this research was provided by:
Tabriz University of Medical Sciences (5/D/962552, Stem Cell Research Center)
Vice-Chancellor for Research, Shiraz University of Medical Sciences (94-01-84-10880)
Received: 24 September 2020
Accepted: 7 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Before interviewing, written consent was obtained from all participants. The study was designed and carried out according to the Ethical Guidelines for Observational Studies [CitationRef removed]. The full study protocol was reviewed and approved by the ethics committee of both Tabriz University of Medical Sciences (Ethics no: IR.TBZMED.REC.1396.438) and Shiraz University of Medical Sciences (Ethics no: IR.SUMS.REC.1395.S378). This report was prepared in compliance with the STROBE statements [CitationRef removed].
: Not applicable.
: The authors have declared that no competing interests exist.