The nitrosoureas--thoughts for the future.
D000970:Antineoplastic Agents / Q000627:therapeutic use*; D004341:Drug Evaluation; D004359:Drug Therapy, Combination; D005472:Fluorouracil / Q000627:therapeutic use; D005770:Gastrointestinal Neoplasms / Q000188:drug therapy; D009607:Nitrosourea Compounds / Q000627:therapeutic use*; D012673:Semustine / Q000627:therapeutic use
D000970:Antineoplastic Agents; D009607:Nitrosourea Compounds; D012673:Semustine; D005472:Fluorouracil