Intensive care unit versus high-dependency care unit for patients with acute heart failure: a nationwide propensity score-matched cohort study.

"Declarations Ethics approval and consent to participateThe Institutional Review Board of The University of Tokyo approved this study. The procedures used in this study adhere to the tenets of the Declaration of Helsinki. No information allowing the identification of individual patients, hospitals, or physicians was obtained, and the requirement for informed consent was waived because of the anonymous nature of the data. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding This work was supported by grants from the Ministry of Health, Labour and Welfare, Japan (Grant Nos. 21AA2007 and 20AA2005) and the Ministry of Education, Culture, Sports, Science and Technology, Japan (Grant No. 20H03907)."