title: Repetitive low-dose radiation therapy for acute stem-cell leukemia.
mesh_terms: D001932:Brain Neoplasms / Q000532:radiotherapy; D002675:Child, Preschool; D006801:Humans; D007278:Injections, Spinal; D007945:Leukemia, Lymphoid / Q000188:drug therapy / Q000532:radiotherapy*; D008727:Methotrexate / Q000008:administration & dosage / Q000627:therapeutic use*; D013120:Spinal Cord Neoplasms / Q000532:radiotherapy
chemical_list: D008727:Methotrexate