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*Gastrointestinal Oncology Service †Department of Medicine ‡Hepatopancreaticobiliary
Surgery Service §Gastroenterology and Nutrition Service Departments of ¶Epidemiology
and Biostatistics ‖Pathology **Radiology ††Surgery; and ‡‡Gastric and Mixed Tumor
Service, Memorial Sloan-Kettering Cancer Center, New York, NY.