Funding for this research was provided by:
Mashhad University of Medical Sciences (950691)
Received: 11 May 2019
Accepted: 20 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The ethical approval for performing this study was obtained from the Ethics Committee of the Mashhad University of Medical Sciences and written informed consent was obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.