Affiliation: | 1. Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences of Niigata University, 1-754, Asahimachi-Dori, Niigata-city, 951-8122, Japan 2. Division of Radiology, Graduate School of Medical and Dental Sciences of Niigata University, 1-754, Asahimachi-Dori, Niigata-city, 951-8122, Japan 3. Takeda General Hospital, Fukushima, Japan 4. Shibata Hospital, Niigata, Japan 5. Nagaoka Red Cross Hospital, Niigata, Japan 6. Saiseikai daini Hospital, Niigata, Japan 7. Juntendo-University Hospital of Shizuoka, Shizuoka, Japan
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