Received: 23 July 2018
Accepted: 22 January 2019
First Online: 4 February 2019
Ethics approval and consent to participate
: Informed written consent was obtained from all participants. The study received ethical approval from the Ethics Committee of Tabriz University of Medical Sciences (IR.TBZMED.REC.1395.13).
: Not applicable.
: The authors declare that they have no competing interests.
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