Funding for this research was provided by:
tehran university of medical sciences
Received: 13 December 2016
Accepted: 23 January 2018
First Online: 30 January 2018
Ethics approval and consent to participate
: This study was conducted with the approval of the Ethics Committee affiliated with Tehran University of Medical Sciences (decree number = IR.TUMS.REC.1395.2576), and a written informed consent was obtained from each participant.
: Not applicable
: The authors declare that they have no competing interest.
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