Received: 25 March 2020
Accepted: 10 June 2020
First Online: 16 June 2020
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of the Birjand University of Medical Sciences (Ir.REC.bums.1397.138), and followed the precepts of the Declaration of Helsinki. All respondents verbally approved the Informed Consent.
: Not applicable.
: The authors declare no conflict of interest.