Text and Data Mining valid from 2019-11-29
Received: 11 June 2019
Accepted: 6 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The Chang Gung Medical Foundation Institutional Review Board approved this study (IRB No. 103-3388B) and waived the requirement for informed consent due to the retrospective nature of the study.
: Consent for publication was available.
: The authors declare that they have no competing interests.