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Authors
Takamatsu, Kimiharu https://orcid.org/0000-0002-3325-6606
Mizuno, Ryuichi https://orcid.org/0000-0002-1507-1421
Baba, Yuto
Yasumizu, Yota
Tanaka, Nobuyuki
Shirotake, Suguru
Takeda, Toshikazu
Morita, Shinya
Matsumoto, Kazuhiro
Kosaka, Takeo
Asanuma, Hiroshi
Oyama, Masafumi
Mikami, Shuji
Oya, Mototsugu
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Article History
Received: 2 February 2021
Accepted: 1 May 2021
First Online: 8 June 2021
Declarations
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: Ryuichi Mizuno MD has received honoraria from Bristol, Novartis, and Pfizer. Mototsugu Oya MD has received honoraria from Bayer, Bristol, Novartis, and Pfizer. Other authors declare that they have no conflict of interest.
: Ethical approval was waived by the local Ethics Committee of Keio University in view of the retrospective nature of the study. All procedures performed in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Because this was a retrospective cohort study, informed consent was waived. Opt out was done on the web site of Keio University.
