Funding for this research was provided by:
taichung veterans general hospital (TCVGH-1107307D and TCVGH-1104402D)
Received: 14 June 2021
Accepted: 12 October 2021
First Online: 21 October 2021
: This study was approved by the Institutional Review Board of Taichung Veterans General Hospital (IRB number: CE19038A). All the individual data were anonymised before analysis, and informed consent was waived.
: Not applicable.
: The authors have declared that no competing interests exist.