Received: 8 October 2017
Accepted: 28 December 2017
First Online: 19 January 2018
Ethics approval and consent to participate
: The study was carried out in accordance with the recommendation of The Institution Review Board Committee (Human) of the University of California, Irvine with approved protocol and informed consent from all subjects. All subjects gave informed consent according to the Declaration of Helsinki. The protocol and consent forms were approved by Institutional Review Board Human Subject Committee.
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