Received: 17 July 2019
Accepted: 29 December 2019
First Online: 18 February 2020
Ethics approval and consent to participate
: The ethical considerations of this study were reviewed by the Ethics Committee of Iran University of Medical Sciences (IR.IUMS.REC.1398.223-2017/01/06). Verbal consent was used because data were collected by using self-assessment questionnaire and thus did not involve any human data. The Ethics Committee approved the use of verbal consent. Questionnaires were completed anonymously to ensure confidentiality.
: Not applicable.
: The authors declare that they have no competing interests.