Received: 15 October 2018
Accepted: 24 February 2019
First Online: 12 March 2019
Ethics approval and consent to participate
: The study protocol was approved by the Human Subjects Institutional Review Board at Tabriz University of Medical Sciences (TUOMS), Tabriz, Iran (IR.tbzmed.rec.1397.442).
: “Not applicable”.
: “The authors declare that they have no competing interests.”
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