Text and Data Mining valid from 2020-01-29
Received: 23 November 2019
Accepted: 16 January 2020
First Online: 29 January 2020
Ethics approval and consent to participate
: The research protocol received the approval of the Ethical Committee of the Tabriz University of Medical Sciences (Code no. IR.TBZMED.REC.1397.682). Written informed consents were obtained from all participants.
: All authors have read and approved the final manuscript.
: The authors declare that they have no competing interests.