Received: 30 September 2019
Accepted: 2 January 2020
First Online: 7 January 2020
Ethics approval and consent to participate
: The purpose and procedures of the study were explained to all participants, and a written informed consent was obtained from all of them. The study was approved by the ethical clearance committees of the Kashan University of Medical Sciences (IR.KAUMS.REC.1396.003).
: Not applicable.
: The authors declare that they have no competing interests.