title: Sequential methotrexate-fluorouracil: the role of leucovorin in improving tumor response.
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D004357:Drug Synergism; D005472:Fluorouracil / Q000008:administration & dosage; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage / Q000378:metabolism*; D008727:Methotrexate / Q000008:administration & dosage
chemical_list: D002955:Leucovorin; D005472:Fluorouracil; D008727:Methotrexate