Gastrointestinal Neoplasms

• Parkway Medical Center — Birmingham, Alabama, United States
• Summit Internal Medicine, PC — Birmingham, Alabama, United States
• University of Alabama at Birmingham — Birmingham, Alabama, United States
• Cullman Clinical Trials — Cullman, Alabama, United States

• University hospital Ghent — Ghent, Oost-Vlaanderen, Belgium

• Óscar Nogales Rincón — Madrid, Spain

• Institut régional du cancer de Montpellier — Montpellier, Hérault, France

• Indiana University Melvin and Bren Simon Cancer Center — Indianapolis, Indiana, United States
• Unversity of Iowa Hospital and Clinics — Iowa City, Iowa, United States
• University of Michigan Health System — Ann Arbor, Michigan, United States

Not specified

• Viet-Tiep Friendship Hospital — Haiphong, Le Chan, Vietnam

• Sarah Cannon Research Institute at HealthONE — Denver, Colorado, United States
• Yale School of Medicine — New Haven, Connecticut, United States
• HCA Midwest - Kansas City — Kansas City, Missouri, United States
• Oklahoma University Health Science Center — Oklahoma City, Oklahoma, United States

• San Francisco Veterans Affairs Medical Center. University of California — San Francisco, California, United States
• University of North Carolina — Chapel Hill, North Carolina, United States
• National Cancer Center — Tokyo, Japan
• Hospital Clínico Universitario Lozano Blesa — Zaragoza, Aragon, Spain

• Massachusetts General Hospital — Boston, Massachusetts, United States
• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States
• Dana Farber Cancer Institute — Boston, Massachusetts, United States