Received: 6 August 2019
Accepted: 17 September 2019
First Online: 24 September 2019
Ethics approval and consent to participate
: The study was approved by the Ethics committee of Shahid Sadoughi University of Medical Sciences-Yazd, and written informed consent was signed by each participant prior to enrollment in the study.
: Not applicable.
: The authors declare that they have no competing interests.