1Department of Gastroenterology and Hepatology, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
2Department of Gastroenterology and Hepatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
3Department of Pathology, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
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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
Data curation: Kimura T. Supervision: Baba U. Visualization: Kimura T, Kishi K. Writing - original draft: Nagashima K. Writing - review & editing: Nagashima K, Kato T, Kimura T. Approval of final manuscript: all authors: all authors.