Received: 18 January 2022
Accepted: 16 September 2022
First Online: 22 September 2022
: This study was a retrospective observational study without any intervention, and the information of all participants was anonymized prior to analysis as unlinked data to prevent the identification of personal information. The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008. The study was approved by the Research Ethical Committee of the Osaka University Hospital (Suita, Japan).
: Not applicable.
: H.K., M.H., K.Y., and M.I. report grants and personal fees from Eisai Inc. The other authors have no conflicts of interest to disclose.