Text and Data Mining valid from 2019-10-11
Received: 10 May 2019
Accepted: 23 August 2019
First Online: 11 October 2019
Compliance with ethical standards
: This project was approved by faculty of sciences, Islamic Azad University of Tabriz branch, Tabriz, Iran on 2016-05-12. the questionnaires were taken by research committee of faculty of sciences and then they were reviewed in accordance with research ethical standards to provide ethical code and finally they were archived there confidential, so we don't access to them now.
: The authors declare that they have no conflicts of interest.