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Authors
Fujisawa, Ryosuke
Okada, Kazunori https://orcid.org/0000-0002-6180-661X
Kaga, Sanae
Murayama, Michito
Nakabachi, Masahiro
Yokoyama, Shinobu
Nishino, Hisao
Tanemura, Asuka
Masauzi, Nobuo
Motoi, Ko
Ishizaka, Suguru
Chiba, Yasuyuki
Tsujinaga, Shingo
Iwano, Hiroyuki
Anzai, Toshihisa
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Article History
Received: 18 July 2021
Accepted: 1 October 2021
First Online: 16 October 2021
Declarations
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: The authors have no conflicts of interest to disclose related to this article.
: This study was carried out according to the principles of the Declaration of Helsinki and was approved as a retrospective observational study by both the Research Ethics Committee of Hokkaido University Hospital and the Ethics Committee of the Faculty of Health Sciences at Hokkaido University. Instead of obtaining informed consent, the program of the present study had been open to the public both through the Internet home page and on the bulletin board of Hokkaido University Hospital; patients who did not wish to participate could request that their data be deleted from the study at any time.
