title: Why has so much chemotherapy done so little in head and neck cancer?
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003131:Combined Modality Therapy; D006258:Head and Neck Neoplasms / Q000188:drug therapy*; D006801:Humans; D011379:Prognosis; D011897:Random Allocation
chemical_list: D000970:Antineoplastic Agents