title: Letter: Classification of anti-tumour drugs.
mesh_terms: D000477:Alkylating Agents / Q000145:classification; D000963:Antimetabolites / Q000145:classification; D000970:Antineoplastic Agents / Q000145:classification* / Q000494:pharmacology / Q000627:therapeutic use; D003561:Cytarabine / Q000008:administration & dosage; D006801:Humans; D008727:Methotrexate / Q000008:administration & dosage
chemical_list: D000477:Alkylating Agents; D000963:Antimetabolites; D000970:Antineoplastic Agents; D003561:Cytarabine; D008727:Methotrexate