Funding for this research was provided by:
Kermanshah University of Medical Sciences (97315)
Received: 8 November 2018
Accepted: 9 October 2019
First Online: 21 October 2019
Ethics approval and consent to participate
: The study was approved by ethics committee of Kermanshah University of Medical Sciences. The oral consent was obtained from participants. According to the rules of the Ethics Committee of KUMS, in non-interventional studies, oral consent is sufficient and there is no need to obtain written consent.
: Not applicable
: The authors declare that they have no competing interests.