Funding for this research was provided by:
Tabriz University of Medical Sciences
Received: 24 August 2019
Accepted: 14 April 2020
First Online: 5 May 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Tabriz University of Medical Sciences (IR.TBZMED.REC.1396.595). The study aims and method were explained and written informed consent was taken from the participants. The sampling was conducted in all healthcare centers in Tabriz, Iran.
: Not applicable.
: The authors declare that they have no conflict of interests.