Ochi, Masanori http://orcid.org/0000-0003-0850-6076
Niikura, Ryota http://orcid.org/0000-0001-5047-6195
Otsubo, Tetsuya http://orcid.org/0000-0001-7308-1989
Yamada, Atsuo http://orcid.org/0000-0003-4314-7777
Kawai, Takashi
Koike, Kazuhiko http://orcid.org/0000-0002-9787-1907
Article History
Accepted: 5 August 2021
First Online: 13 August 2021
Declarations
:
: The University of Tokyo Hospital Institutional Review Board approved the study (2058–2). The study was performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: The University of Tokyo Hospital Institutional Review Board waived the requirement for patient informed consent because we used anonymized data.
: The authors declare no competing interests.