Received: 21 September 2020
Accepted: 11 November 2020
First Online: 18 November 2020
Ethics approval and consent to participate
: This research was not financially supported. The present study was conducted in accordance with the ethical standards of the Tehran University of Medical Sciences (Ethics Number: IR. TUMS.VCR.REC. 1398.503) and performed in accordance with the principles outlined in the Declaration of Helsinki. All participants signed a written informed consent prior to the start of the study.
: Not applicable.
: The authors declare that they have no competing interests.