Funding for this research was provided by:
ministry of health, labour and welfare (21AA2007)
ministry of education, culture, sports, science and technology, japan (20H03907, 21H03159)
Received: 4 July 2021
Accepted: 20 October 2021
First Online: 29 October 2021
: The Institutional Review Board of The University of Tokyo approved the study protocol (10862-). The anonymous nature of the data allowed the requirement for informed consent from the patients to be waived.
: Not applicable.
: The authors declare that they have no conflict of interest.