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Authors
Terui, Keita
Tazuke, Yuko
Nagata, Kouji
Ito, Miharu
Okuyama, Hiroomi
Hayakawa, Masahiro
Taguchi, Tomoaki
Sato, Yasunori
Usui, Noriaki
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Article History
Accepted: 6 November 2020
First Online: 28 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest.
: The study design was approved by the Research Ethics Committee of the Graduate School of Medicine, Chiba University (no. 509), and the independent ethics committees of the four other participating institutions. The study was performed in accordance with the principles of the Declaration of Helsinki and the Ethical Guidelines for Medical and Health Research Involving Human Subjects.
: Signed informed consent was not required, as this was a retrospective study with de-identified data. The details of the study have been published on the institutional website and individuals have been guaranteed the right to decline participation in the study.
