Funding for this research was provided by:
the Chi-Mei & National Cheng Kung University Joint Program (CMNCKU10309)
Received: 15 October 2020
Accepted: 31 March 2021
First Online: 29 April 2021
: This study was approved by the Institutional Review Board of National Cheng Kung University Hospital as exemption of review because of using public open data.
: Not applicable.
: The authors have no competing conflicts of interest regarding this manuscript.