Text and Data Mining valid from 2019-08-05
Received: 29 November 2018
Accepted: 30 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: This study was conducted according to the Declaration of Helsinki. The Institutional Review Board of Chi-Mei Medical Center approved of this study and waived the need for informed consent from participants because the dataset consists of de-identified data. This waiver does not affect the rights and welfare of the participants.
: Not applicable.
: The authors declare that they have no competing interests.