Received: 15 August 2018
Accepted: 11 February 2019
First Online: 27 February 2019
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of the Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran and all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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