Gastrointestinal Neoplasms

• Prince of Wales Hospital, The Chinese University of Hong Kong — Shatin, New Territories, Hong Kong
• Alice Ho Miu Ling Nethersole Hospital — Hong Kong
• Prince of Wales Hospital — Hong Kong

• Beijing Cancer Hospital — Beijing, Beijing Municipality, China
• West China Hospital, Sichuan University — Chengdu, Sichuan, China
• First Affiliated Hospital of Kunming Medical University — Kunming, Yunnan, China
• Zhejiang Cancer Hospital — Hangzhou, Zhejiang, China

• Scottsdale, Arizona, United States
• Evanston, Illinois, United States
• Skokie, Illinois, United States
• Boston, Massachusetts, United States

• University of North Carolina-Chapel Hill — Chapel Hill, North Carolina, United States

• Istituto di chirurgia generale 1 — Ferrara, Italy

• Wake Forest University School of Medicine — Winston-Salem, North Carolina, United States

• Chung-Ang University College of Medicine — Seoul, South Korea

• Shanghai Yangpu District East Hospital — Shanghai, Shanghai Municipality, China

Not specified

• University Hospital of North Norway — Tromsø, Troms, Norway