title: Radioimmunoassay of methotrexate, leucovorin, and 5-methyltetrahydrofolate.
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D006041:Goats; D006241:Haptens / Q000276:immunology; D006801:Humans; D002955:Leucovorin / Q000032:analysis*; D008727:Methotrexate / Q000032:analysis* / Q000627:therapeutic use; D009369:Neoplasms / Q000032:analysis / Q000188:drug therapy; D011817:Rabbits; D011863:Radioimmunoassay / Q000379:methods*; D012756:Sheep; D013763:Tetrahydrofolates / Q000032:analysis*
chemical_list: D006241:Haptens; D013763:Tetrahydrofolates; D002955:Leucovorin; C005984:5-methyltetrahydrofolate; D008727:Methotrexate