Received: 16 November 2019
Accepted: 8 May 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: This study was approved by the human research ethics committee of Shahid Beheshti University of Medical Sciences, Tehran, Iran (Grant No. 9820), and it was carried out in accordance with the approved guidelines. Written consent informed was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.