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Research design is a retrospective observational study. Informed consent was obtained by the opt-out approach. The study protocol was approved by the Ethics Committee of the National Center for Global Health and Medicine (NCGM-S-004344-00), and the study was performed in accordance with the Declaration of Helsinki.
Copyright and License information: ©2023, Hakoshima et al.
This article is distributed under the terms of the Creative Commons Attribution Non-Commercial 4.0 International License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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