Funding for this research was provided by:
Chang Gung Memorial Hospital, Linkou (CMRPG3E1491)
Text and Data Mining valid from 2018-04-24
Received: 15 September 2017
Accepted: 17 April 2018
First Online: 24 April 2018
Ethics approval and consent to participate
: This study was approved by the institutional review board of Chang Gung Memorial Hospital, with a waiver of informed consent because all patient records and information were anonymized and de-identified prior to analysis.
: The authors declare that they have no competing interests.
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