title: Letter: Methotrexate with citrovorum-factor rescue.
mesh_terms: D001853:Bone Marrow / Q000378:metabolism; D001854:Bone Marrow Cells; D004247:DNA / Q000096:biosynthesis; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage* / Q000494:pharmacology / Q000627:therapeutic use; D008727:Methotrexate / Q000008:administration & dosage* / Q000627:therapeutic use / Q000633:toxicity
chemical_list: D004247:DNA; D002955:Leucovorin; D008727:Methotrexate