Funding for this research was provided by:
the Research Services Center for Health Information, Chang Gung University, Taoyuan, Taiwan (CIRPD1D0031)
Text and Data Mining valid from 2019-10-28
Received: 22 January 2019
Accepted: 12 September 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: Ethics permission was granted by the Institutional Review Board of the Chang Gung Memorial Hospital (IRB No: 103-2508B) and inform consent was waived by the ethics committee.
: Not applicable.
: The authors declare that they have no competing interests.