Received: 9 December 2020
Accepted: 3 March 2021
First Online: 15 March 2021
: The Ethics Committee of Mazandaran University of Medical Sciences, Sari, Iran, approved this study (code: IR.MAZUMS.REC.1399.7390). We confirm all methods were performed in accordance with the relevant guidelines and regulations. We confirm that written informed consent for study participations and all the explanations were displayed in the first page of the questionnaire. Questionnaires were anonymous.
: Not applicable.
: The authors declare that they have no competing interests.