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Authors
Okada, Yohei https://orcid.org/0000-0002-2266-476X
Matsuyama, Tasuku
Morita, Sachiko
Ehara, Naoki
Miyamae, Nobuhiro
Jo, Takaaki
Sumida, Yasuyuki
Okada, Nobunaga
Watanabe, Makoto
Nozawa, Masahiro
Tsuruoka, Ayumu
Fujimoto, Yoshihiro
Okumura, Yoshiki
Kitamura, Tetsuhisa
Iiduka, Ryoji
Ohtsuru, Shigeru
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Article History
Received: 30 October 2020
Accepted: 2 January 2021
First Online: 9 January 2021
Ethics approval and consent to participate
: According to the Ethical Guidelines for Medical and Health Research Involving Human Subjects in Japan, the ethics committee of the participating center approved the registry protocol and retrospective analysis of this study with a waiver of informed consent, because this study used only anonymized, already-existing data. Further, the information about the study was made open to the public, and the opportunities to refuse participation in the study were guaranteed (ethical approval ID of representative institution, Kyoto Prefectural University of Medicine: ERB-C-633).
: Not applicable.
: The authors declare that they have no competing interests.
