Funding for this research was provided by:
Iran University of Medical Sciences (IR.IUMS.FMD. 1396.9511373005)
Text and Data Mining valid from 2019-10-12
Received: 13 March 2019
Accepted: 13 September 2019
First Online: 12 October 2019
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Iran University of Medical Sciences, Tehran, Iran (IR.IUMS.FMD. 1396.9511373005). Furthermore, informed written consent was obtained from the participants, and the respondents were completely informed of the study purpose and procedures. In addition, they were assured of the confidentiality of information.
: Not applicable
: The authors declare that they have no competing interests.