Article History
Received: 17 September 2017
Accepted: 3 April 2018
First Online: 23 April 2018
Ethics approval and consent to participate
: This study was approved by the institutional review board at Chang Gung Memorial Hospital (103-6434B); the informed consent was waived. All clinical investigations have been conducted according to the principles expressed in the Declaration of Helsinki.
: There were no financial or non-financial competing interests regarding to this study.
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