Article History
Received: 16 May 2018
Accepted: 27 December 2018
First Online: 6 January 2019
Compliance with ethical standards
:
: No conflict of interest declared.
: No human subjects were involved in the study.
: Different ethical aspects of present research was approved by the Ethics Council of Tabriz University of Medical Sciences (IR.TBZMED.REC.1397.58746 (and all the participants signed the consent form of the research, and they was assured that their information was held confidentially.