Gastrointestinal Neoplasms

• Glan Clwyd hospital — Bodelwyddan, United Kingdom
• Cancer Institute Bristol — Bristol, United Kingdom
• Addenbrooke's Hospital — Cambridge, United Kingdom
• Velindre Cancer Centre — Cardiff, United Kingdom

• Saint-Antoine Hospital - AP-HP, Department of general and digestive surgery — Paris, France

• Roswell Park Cancer Institute — Buffalo, New York, United States
• Mount Sinai School of Medicine — New York, United States

• Asan medical center — Seoul, Songpa-gu, South Korea

• Baylor College of Medicine — Houston, Texas, United States

• Nottingham University Hospital — Nottingham, United Kingdom

• Tom Baker Cancer Centre — Calgary, Alberta, Canada

• Department of Gastric Surgery — Fuzhou, Fujian, China

Not specified

• Department of Gastric Surgery — Fuzhou, Fujian, China