Received: 16 April 2021
Accepted: 5 October 2021
First Online: 13 October 2021
: This study was approved by the institutional review board of the School of Public Health of Tehran University of Medical Sciences (IR.TUMS.SPH.REC.1395.508). Participants were informed that participation in the study was voluntary and that they could withdraw from the study at any time. The informed consent included information about the project aims and information about the topic of the interview, voluntary participation in and withdrawal from the research project. The informed consent was obtained from all the participants.
: Not applicable.
: This study is part of Ph.D. thesis of the first author in the School of Public health in Tehran University of Medical Sciences. The authors declare no conflicts of interest.