Institution: | 1. Second Department of Internal Medicine, Faculty of Medicine, Shimane University, Izumo, Japan 2. Division of Endoscopy, Shimane University Hospital, 89-1, Enya-cho, Izumo-shi, Shimane, 693-8501, Japan 3. Division of Cancer Center, Shimane University Hospital, 89-1, Enya-cho, Izumo-shi, Shimane, 693-8501, Japan
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