Text and Data Mining valid from 2019-08-27
Received: 24 June 2019
Accepted: 20 August 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: Ethical clearance was obtained from the Ethics Committee of Zanjan University of Medical Sceinces before conducting the study (IR.ZUMS.REC.1394.324, ZUMS.REC.1394.177). All participants provided written informed consent to participate in the studies.
: Not applicable.
: The authors declare that they have no competing interests.