Text and Data Mining valid from 2018-11-13
Received: 2 March 2018
Accepted: 26 October 2018
First Online: 13 November 2018
Ethics approval and consent to participate
: This study design was approved by the Institutional Review Board of Chang-Gung Medical Foundation (No.104-8058B), who waived the need for informed consent. All individual information was deidentified.
: Not applicable.
: All authors state that they have no conflicts of interest.
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