1. Department of Gastrointestinal Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
2. Intensive Care Unit
3. Clinical Research, The First Affiliated Hospital of Jinan University, Guangzhou
4. Department of Gastrointestinal Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang
5. Department of General Surgery, Taihe Hospital, Hubei University of Medicine, Shiyan
6. School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
7. Section of Gastroenterology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
8. Division for Health Service Promotion, The University of Tokyo, Tokyo, Japan