title: Effects of early leucovorin rescue.
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D004334:Drug Administration Schedule; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage*; D008727:Methotrexate / Q000008:administration & dosage / Q000037:antagonists & inhibitors
chemical_list: D002955:Leucovorin; D008727:Methotrexate