Funding for this research was provided by:
the Jikei University Research Fund (none)
Received: 29 April 2021
Accepted: 30 June 2021
First Online: 8 July 2021
: This study is a post hoc analysis of a prospective observational study. The original study protocol was approved by the Jikei University Institutional Review Board (28-200) and the ethics committees of all other participating hospitals with a patient or proxy opt-out policy.
: Participants consented to the submission of this original article to the journal via an opt-out policy.
: The authors declare no competing interests.