Funding for this research was provided by:
Chang Gung Memorial Hospital, Linkou (CMRPG8E1221)
Received: 25 October 2017
Accepted: 5 January 2018
First Online: 30 January 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board of CGMHK (104-3530B), and the patients gave written consent according to the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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