Adenocarcinoma/drug therapy; Adenocarcinoma/surgery; Antineoplastic Combined Chemotherapy Protocols/therapeutic use; Cisplatin/administration & dosage; Stomach Neoplasms/drug therapy; Stomach Neoplasms/surgery; Taxoids/administration & dosage; Adolescent; Adult; Aged; Antineoplastic Combined Chemotherapy Protocols/adverse effects; Camptothecin/adverse effects; Camptothecin/analogs & derivatives; Camptothecin/therapeutic use; Chemotherapy, Adjuvant/adverse effects; Chemotherapy, Adjuvant/methods; Cisplatin/adverse effects; Diarrhea/chemically induced; Digestive System Surgical Procedures; Disease-Free Survival; Docetaxel; Drug Administration Schedule; Feasibility Studies; Female; Fluorouracil/adverse effects; Fluorouracil/therapeutic use; Humans; Leucovorin/adverse effects; Leucovorin/therapeutic use; Male; Middle Aged; Mitomycin/administration & dosage; Mitomycin/adverse effects; Neutropenia/chemically induced; Prospective Studies; Survival Rate; Taxoids/adverse effects; Thrombocytopenia/chemically induced; Treatment Outcome