Received: 18 October 2017
Accepted: 13 February 2018
First Online: 27 February 2018
Ethics approval and consent to participate
: Written informed consents were obtained from all participants. The ethics research council of the Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences in Tehran approved the study protocol.
: Not applicable.
: The authors declare that they have no competing interests.
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