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Article History

Received: 10 April 2018

Accepted: 29 November 2018

First Online: 12 December 2018

Ethics approval and consent to participate

: A research protocol including methods, and ethical considerations was produced prior to the initiation of the study. The study protocol was approved by the institutional review board of Tehran University of Medical Sciences. Written informed consent was obtained from all participants.

: Not applicable.

: The authors declare that they have no competing interests.

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