Article History
Received: 18 December 2019
Revised: 20 May 2020
Accepted: 21 May 2020
First Online: 3 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ethical and cultural considerations of the study were approved by the Ethics Committee of Tehran University of Medical Sciences, Tehran, Iran. All participants were informed about the objectives of the study and were ensured confidentiality and anonymity. We certify that all applicable institutional and governmental regulations concerning the ethical use of human volunteers were followed during the course of this research.
: They provided informed written consents and granted permission to audio-record their conversations.