1. Division of Esophageal Surgery, Shizuoka Cancer Center Hospital
2. Department of Biostatistics, Graduate School of Medicine, The University of Tokyo
3. Faculty of Engineering, Tokyo University of Science
4. Department of Surgery, Tokai University
5. Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine
6. Cancer Treatment Center, Kochi Medical School Hospital
7. Department of Surgery, Yokohama City University
8. Tokai Central Hospital
9. Japanese Foundation for Multidisciplinary Treatment of Cancer
10. Department of Gastrointestinal Surgery, Kanagawa Cancer Center