Funding for this research was provided by:
Iran University of Medical Sciences (28113)
Received: 28 September 2019
Accepted: 15 November 2020
First Online: 14 January 2021
Ethics approval and consent to participate
: Ethical approval was obtained from the ethics committee of Iran University of Medical Sciences, Tehran, Iran (Code: IR.IUMS.REC.1395.28113). All the participants read a statement that explained the purpose of the study and provided written informed consent before participation in the study. The participants were reminded that the study was voluntary, confidential and the results would remain anonymous.
: Not applicable.
: The authors declare that they have no competing interests.