Funding for this research was provided by:
Mashhad University of Medical Sciences
Received: 29 September 2020
Accepted: 24 November 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: Written informed consent was obtained from all participants, and the study was approved by the ethics committee of Mashhad University of Medical Sciences with Ref No. IR.MUMS.sm.1396.509.
: Not applicable.
: The authors declare that they have no competing interests.