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Phase II study of S-1 as first-line treatment for elderly patients over 75 years of age with advanced gastric cancer: the Tokyo Cooperative Oncology Group study

Geriatric OncologyElderly PatientsGastrointestinal OncologyMedicineAdvanced Gastric CancerCancer ManagementGastroenterologyPhase Ii StudySurgeryOncologyRadiation OncologyCancer Research