Funding for this research was provided by:
Golestan University of Medical Sciences (930514100)
Received: 28 December 2019
Accepted: 26 May 2020
First Online: 11 June 2020
Ethics approval and consent to participate
: This research is approved by ethics committee of Golestan University of Medical Science (#14791793061924).
: Not applicable.
: The authors declare that they have no conflicts of interest.