Received: 3 October 2020
Accepted: 2 January 2021
First Online: 9 January 2021
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Tehran University of Medical Sciences (Ethics Code: IR.TUMS.SPH.REC.1397.269) and written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.