Funding for this research was provided by:
Ministry of Health, Labour and Welfare (19AA2007, H30-Policy-Designated-004)
the Ministry of Education, Culture, Sports, Science and Technology (17H04141)
The University of Tokyo
Article History
Received: 30 November 2022
Accepted: 17 March 2023
First Online: 29 March 2023
Declarations
:
: The study protocol was approved by the Institutional Review Board of the University of Tokyo (approval number: 3501-3; December 25, 2017). This study was performed in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The requirement of informed consent from the patients was waived due to the retrospective nature of this observational study that analyzed de-identified data.
: The authors declare no competing interests.