Text and Data Mining valid from 2020-03-11
Received: 22 October 2019
Accepted: 27 February 2020
First Online: 11 March 2020
Ethics approval and consent to participate
: Ethical approval for the study was obtained from the Research Ethics Committee of the Tabriz University of Medical Sciences (Ethical code: IR.TBZMED.REC.1397.789). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.