1Department of Endoscopy, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
2Department of Infectious Diseases, Respiratory, and Digestive Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
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Funding Source
The authors received no financial support for the research, authorship, and/or publication of this article.
Conflict of Interest
No potential conflict of interest relevant to this article was reported.
Author Contribution
Conceptualization: Hokama A. Data curation: Hokama A, Nakada Y, Yanagida A, Koga E, Hoshino K. Supervision: Fujita J. Writing - original draft: Hokama A. Approval of final manuscript: all authors.