Institution: | 1. Department of Surgery, National Health Insurance Oami Hospital, 884-1 Tomita, Oamishirasato-machi, Sanbu-gun, Chiba, 299-3221, Japan 2. Department of Clinical Pathology, Chiba Foundation for Health Promotion and Disease Prevention, 32-14 Shinminato, Mihama-ku, Chiba, 261-0002, Japan 3. Department of Internal Medicine, National Health Insurance Oami Hospital, Sanbu-gun, Chiba, Japan 4. Department of General Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8677, Japan
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