Received: 3 December 2018
Accepted: 16 October 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Sanandaj Medical University [no: 2340/01]. All subjects provided written informed consent. In the cases of participants less than 16 years old, consent was collected from the parents.
: Not applicable.
: The authors declare that they have no competing interests.