Gastroesophageal Junction (GEJ) Adenocarcinoma

• Pan American Center for Oncology Trials — Dorado, Puerto Rico
• Niigata Cancer Center Hospital — Niigata, Japan
• Metro Minnesota Community Oncology Research Consortium — Saint Louis Park, Minnesota, United States

• University of California Irvine Medical Center — Orange, California, United States
• UCLA Dept of Medicine - Hematology/Oncology, Santa Monica — Santa Monica, California, United States
• Northwestern University — Chicago, Illinois, United States
• University of Kansas Cancer Center — Westwood, Kansas, United States

• Chiba Cancer Center — Chiba, Japan
• Kyushu Cancer Center — Fukuoka, Japan
• Gifu University Hospital — Gifu, Japan
• Gunma University Hospital — Maebashi, Gunma, Japan

• NEXT Virginia — Fairfax, Virginia, United States

• Research Site — Scottsdale, Arizona, United States
• Research Site — Duarte, California, United States
• Research Site — Orange, California, United States
• Research Site — Boston, Massachusetts, United States

• National Cancer Center Hospital East — Kashiwa, Chiba, Japan

Not specified

Not specified

Not specified

• UCSF Medical Center — San Francisco, California, United States
• Yale Cancer Center — New Haven, Connecticut, United States
• START Midwest — Grand Rapids, Michigan, United States
• Memorial Sloan Kettering Cancer Center — New York, United States