title: The reversal of methotrexate toxicity by thymidine with maintenance of antitumour effects.
mesh_terms: D000493:Allopurinol / Q000494:pharmacology; D000818:Animals; D004359:Drug Therapy, Combination; D002955:Leucovorin / Q000627:therapeutic use; D007939:Leukemia L1210 / Q000188:drug therapy*; D008297:Male; D008727:Methotrexate / Q000627:therapeutic use* / Q000633:toxicity; D051379:Mice; D013936:Thymidine / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D000493:Allopurinol; D002955:Leucovorin; D013936:Thymidine; D008727:Methotrexate