Funding for this research was provided by:
Ministry of Health and Education (700/148)
Received: 28 September 2020
Accepted: 14 October 2020
First Online: 2 November 2020
Ethics approval and consent to participate
: The study protocol follows the principles laid down in the Helsinki declaration and has been approved by the ethics committee of the Iranian MOHME, and the institutional review board of the MUMS (IR.MUMS.REC.1395.526; January 2017). The written informed consent is obtained from all participants prior to the baseline survey and they can make an informed decision about whether or not to continue participation at any time.
: Not applicable.
: The authors declare that they have no competing interests.