1. Department of Anesthesiology Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School Nanjing China
2. Queen Mary School Nanchang University Nanchang China
3. Department of Anesthesiology The First Affiliated Hospital of Guangxi Medical University Nanning China
4. Department of Gastrointestinal Surgery The Fourth Affiliated Hospital of China Medical University Shenyang China
5. Division of Gastrointestinal Surgery Department of Surgery Graduate School of Medicine Kyoto University Kyoto Japan
6. Division for Health Service Promotion The University of Tokyo Tokyo Japan
7. Department of Gastrointestinal Surgery Graduate School of Medicine The University of Tokyo Tokyo Japan