Institution: | 1. Department of General and Gastroenterological Surgery, Osaka Medical College Hospital, Takatsuki, 2-7 Daigaku-machi, Takatsuki City, Osaka, 569-8686, Japan 2. Department of Hepato-Biliary-Pancreatic Surgery, Osaka City University Graduate School of Medicine, Osaka, Osaka, 545-8585, Japan 3. Department of Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan 4. Department of Surgery, Kinki University Faculty of Medicine, Sayama, Osaka, 589-8511, Japan 5. Department of Surgery, Hirakata Hospital, Kansai Medical University, Hirakata, Osaka, 573-1191, Japan
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