Institution: | 1. Department of Medicine, Tsuchiura Kyodo Hospital, 11-7 Manabeshinmachi, 300, Tsuchiura, Ibaraki, Japan 2. Second Department of Internal Medicine, Tokyo Medical and Dental University, 5-45, Yushima 1-chome, Bunkyo-ku, 113, Tokyo, Japan 3. Department of Surgery, Tsuchiura Kyodo Hospital, 11-7 Manabeshinmachi, 300, Tsuchiura, Ibaraki, Japan 4. Department of Radiology, Tsuchiura Kyodo Hospital, 11-7 Manabeshinmachi, 300, Tsuchiura, Ibaraki, Japan 5. Department of Pathology, Tsuchiura Kyodo Hospital, 11-7 Manabeshinmachi, 300, Tsuchiura, Ibaraki, Japan
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