Affiliation: | 1. First Department of Surgery, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka, 181, Tokyo, Japan 2. Department of Surgery, International Medical Center of Japan, Tokyo, Japan 3. Department of Surgery, Teikyo University School of Medicine, Ichihara Hospital, Chiba, Japan 4. Hospital of the Imperial Household, Tokyo, Japan 5. First Department of Surgery, Tokyo University School of Medicine, Tokyo, Japan
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