Received: 14 December 2020
Accepted: 5 April 2021
First Online: 9 June 2021
: The study was approved by the Ethical approval was obtained from the Birjand University of Medical Sciences, (grant No: 5243). Participation in the study was voluntary and with full consent of respondents. All participants provided written informed consent.
: Not applicable as no personal data was used in this article.
: The authors declare that they have no conflict of interest.