Article History
Received: 29 July 2017
Accepted: 3 April 2018
First Online: 11 May 2018
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Institutional Review Board of our Medical Center (IRB No. 2015-04-026). Informed consent was submitted by all subjects when they were enrolled.
: The authors declare that they have no competing interests.
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