Funding for this research was provided by:
Tehran University of Medical Sciences and Health Services (95-02-28-32630)
Received: 1 February 2018
Accepted: 18 April 2018
First Online: 2 May 2018
Ethics approval and consent to participate
: This research was ethically approved by Tehran University of Medical sciences ethics committee (reference No IR.TUMS.VCR.REC.1395.374).
: The authors declare that have no competing interest that may be relevant to the submitted work.
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