title: Previous tonsillectomy and the incidence of acute leukaemia of childhood.
mesh_terms: D000208:Acute Disease; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology; D008396:Maryland; D008910:Minnesota; D009518:New York; D011183:Postoperative Complications; D014068:Tonsillectomy