Affiliation: | 1. Department of Gastroenterology and Oncology, Institute of Health Biosciences, University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan 2. Department of Gastroenterology, Hokkaido Cancer Center, National Hospital Organization, 4-2-3-54 Shiraishi-ku, Kikusui, Sapporo, Hokkaido, 003-0804, Japan 3. Fourth Department of Internal Medicine, Sapporo Medical University, South-1, West-16, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan 4. Department of Radiation Therapy Technology, Institute of Health Biosciences, University of Tokushima Graduate School, 3-18-15, Kuramoto-cho, Tokushima, 770-8503, Japan
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