Text and Data Mining valid from 2020-01-30
Received: 10 October 2018
Accepted: 20 January 2020
First Online: 30 January 2020
Ethics approval and consent to participate
: This study performed in Birjand University of Medical Sciences, with the following ethical code: ir.bums.rec.1395.16.All procedures performed in the study involving human participants were in accordance to the ethical standards of the institutional and/or national research committee and the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The Authors declared no conflict of interest.