Funding for this research was provided by:
National Science Foundation (DBI-0939454)
Tabriz University of Medical Sciences (5/4/9632)
Received: 17 April 2017
Accepted: 11 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: The study was approved by the Students Research Committee (No.5/46/210) and Ethical Regional Committee (No. 5/4/9632) of Tabriz University of Medical Sciences and Health Services, Tabriz, Iran. The Institutional Review Board at the North Carolina Agricultural and Technical State University (NCAT) received the approved letters. All participants were informed of the purpose of the study, and all participants signed the written consent form.
: Not applicable
: The authors declare that they have no competing interests.
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