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Authors
Nakaya, Izaya https://orcid.org/0000-0002-0792-6514
Goto, Taijiro
Nakamura, Yuki
Yoshikawa, Kazuhiro
Oyama, Junji
Tamayama, Yoshihiko
Morooka, Mizuho
Ito, Sadatoshi
Ishioka, Hirotaka
Matsuura, Yuki
Soma, Jun
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Article History
Received: 19 September 2020
Accepted: 4 January 2021
First Online: 14 January 2021
Ethics approval and consent to participate
: The Ethics Committee of Iwate Prefectural Central Hospital approved this study, and it was conducted in accordance with the ethical principles of the Declaration of Helsinki. We did not obtain written informed consent from the patients because the ethical guidelines for epidemiological research in Japan do not require informed consent for a cross-sectional study using only existing medical records.
: Not applicable.
: The authors declare that they have no competing interests.
