Funding for this research was provided by:
Shahid Behesti University of Medical Sciences (10307)
Received: 31 August 2018
Accepted: 10 June 2019
First Online: 3 July 2019
Ethics approval and consent to participate
: This study was supported by Social Determinants of Health Research Center, and approved by Shahid Beheshti University of Medical Sciences Ethics Committee, Tehran, Iran (IR.SBMU.RETECH.REC.1397.428). It complies with the Declaration of Helsinki; our local ethics committee has approved the research protocol and written informed consent was obtained from the subjects on arrival time.
: The authors declare that they have no competing interests.