Gastroesophageal Junction Cancer

• Memorial Sloan Kettering at Basking Ridge (Limited protocol activities) — Basking Ridge, New Jersey, United States
• Memorial Sloan Kettering at Monmouth (Limited Protocol Activities) — Middletown, New Jersey, United States
• Memorial Sloan Kettering at Bergen (Limited Protocol Activities) — Montvale, New Jersey, United States
• Memorial Sloan Kettering at Suffolk-Commack (Limited Protocol Activities) — Commack, New York, United States

• Rocky Mountain Cancer Centers, LLP — Aurora, Colorado, United States
• Rocky Mountain Cancer Centers, LLP — Boulder, Colorado, United States
• Rocky Mountain Cancer Centers, LLP — Centennial, Colorado, United States
• Rocky Mountain Cancer Centers, LLP — Colorado Springs, Colorado, United States

• Masaryk Memorial Cancer Institute — Brno, Czechia

• Washington University School of Medicine — St Louis, Missouri, United States

• Bakirkoy Dr. Sadi Konuk Training and Research Hospital — Istanbul, Turkey (Türkiye)

• Research Site — Orange, California, United States
• Research Site — Palo Alto, California, United States
• Research Site — Santa Rosa, California, United States
• Research Site — Louisville, Kentucky, United States

• Beijing Friendship Hospital, Capital Medical University — Beijing, Beijing Municipality, China

Not specified

Not specified

• Ruijin Hospital affiliated to Shanghai Jiao Tong University of Medicine — Shanghai, China