title: Maintenance therapy of intermittent high-dose methotrexate in acute childhood leukemia--4-year survivals.
mesh_terms: D002648:Child; D004334:Drug Administration Schedule; D005500:Follow-Up Studies; D006801:Humans; D007945:Leukemia, Lymphoid / Q000188:drug therapy*; D008727:Methotrexate / Q000008:administration & dosage*
chemical_list: D008727:Methotrexate