Received: 24 November 2021
Accepted: 23 March 2022
First Online: 12 April 2022
: This study was approved by the Osaka University Hospital Institutional Review Board (#13397), and it conforms to the provisions of the Declaration of Helsinki. The requirement for informed consent was waived due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.