Received: 22 June 2020
Accepted: 22 March 2021
First Online: 20 May 2021
: The study (No. CCH 191244) was approved by the Institutional Review Board of the Changhua Christian Hospital. Verbal informed consent was obtained from each patient, and the Ethics Committee approved this procedure. Since this is a retrospective study, a waiver of written informed consent was obtained from the Ethics Committee. The data used in this study was anonymized before its use.
: Not applicable.
: The authors declare that they have no conflict of interest.