Funding for this research was provided by:
Mashhad University of Medical Sciences (971327)
Received: 5 September 2020
Accepted: 22 April 2021
First Online: 5 May 2021
: The study was approved by the ethics committee of the Research Department of Mashhad University of Medical Sciences (protocol number: IR.MUMS.MEDICAL.REC.1398.130).
: Not applicable.
: The authors declare that they have no competing interests.