Received: 2 June 2021
Accepted: 11 August 2021
First Online: 2 September 2021
: This retrospective review of the clinical charts was approved by the Institutional Review Board at Kitasato University Hospital (B20-303) and followed the tenets of the Declaration of Helsinki. Our Institutional Review Board waived the requirement for informed consent for this retrospective study.
: Not applicable.
: The authors have declared that no competing interests exist.