Drug resistance in medical oncology.
D000970:Antineoplastic Agents / Q000627:therapeutic use*; D018288:Carcinoma, Small Cell / Q000188:drug therapy*; D004317:Doxorubicin / Q000627:therapeutic use*; D004351:Drug Resistance; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy*; D008727:Methotrexate / Q000627:therapeutic use
D000970:Antineoplastic Agents; D004317:Doxorubicin; D008727:Methotrexate