title: Letter to the editor.
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use*; D001500:BCG Vaccine / Q000627:therapeutic use*; D002648:Child; D004359:Drug Therapy, Combination; D006801:Humans; D007945:Leukemia, Lymphoid / Q000628:therapy*; D012075:Remission, Spontaneous; D013997:Time Factors
chemical_list: D000970:Antineoplastic Agents; D001500:BCG Vaccine