Funding for this research was provided by:
University of Kurdistan (grant number 14/20137; Monday, 13 July 2015)
Text and Data Mining valid from 2018-03-12
Received: 13 September 2017
Accepted: 27 February 2018
First Online: 12 March 2018
Compliance with ethical standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The author declares that there is no conflict of interest.
: Informed consent was obtained from all individual participants included in the study.