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Article History

Received: 19 November 2018

Accepted: 22 April 2019

First Online: 3 May 2019

Ethics approval and consent to participate

: The study was approved by research ethics committee of Kermanshah University of Medical Sciences with the code: IR.KUMS.REC.1397.077. The written informen consent was obtained from all the participants.

: No Applicable.

: The authors declare there are no competing interests.

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