Received: 22 June 2022
Accepted: 3 August 2022
First Online: 8 August 2022
: This retrospective study was conducted with the approval of the Hokkaido University Hospital Independent Clinical Research Review Committee (Approval No. 018–0381) and waived the requirement for informed consent owing to the retrospective design.
: Not applicable.
: The authors declare that they have no competing interests.