Article History
Received: 13 July 2020
Accepted: 8 December 2020
First Online: 8 January 2021
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: Approval was obtained from the ethics committee of the University of Birjand. The procedures used in this study adhere to the tenets of the Declaration of Birjand.
: Not applicable.
: Not applicable.