Received: 21 August 2019
Accepted: 7 January 2020
First Online: 14 January 2020
Ethics approval and consent to participate
: The research project was approved by Tehran University of MedicalSciences, Tehran, Iran Ethics Committee. The purpose of the study was fully explained in the questionnaire and responses to questions was on a voluntary basis. All participants were assured of anonymity and confidentiality.
: Participants were provided a study overview and verbal consent was attained.
: The authors declare that they have no competing interests.