Digestive System Neoplasms

• Birmingham, Alabama, United States
• Los Angeles, California, United States
• Orange, California, United States
• San Francisco, California, United States

• Fudan University Shanghai Cancer Hospital — Shanghai, China

• California Cancer Registry — Sacramento, California, United States
• University of Colorado Cancer Center — Aurora, Colorado, United States
• Colorado Central Cancer Registry — Denver, Colorado, United States
• Cancer Data Registry of Idaho — Boise, Idaho, United States

• Moffitt Cancer Center — Tampa, Florida, United States
• University of North Carolina at Chapel Hill Lineberger Comprehensive Cancer Center — Chapel Hill, North Carolina, United States
• Comprehensive Cancer Center of Wake Forest University — Winston-Salem, North Carolina, United States

• Radboud University Medical Centre Nijmegen — Nijmegen, Gelderland, Netherlands

• Krankenhaus Nordwest — Frankfurt, Germany

• Eastern hepatobilliary surgery hospital — Shanghai, Shanghai Municipality, China

• Queen Mary University of London — London, United Kingdom

Not specified

• Eastern hepatobilliary surgery hospital — Shanghai, Shanghai Municipality, China