Text and Data Mining valid from 2019-08-13
Received: 21 January 2019
Accepted: 1 August 2019
First Online: 13 August 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The current human study was approved by the science and bioethics committee of Golestan University of Medical Sciences (IR.GOUMS.REC.1397.045).