Seasonal childhood acute lymphocytic leukemia in the midwest.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D006801:Humans; D007223:Infant; D007945:Leukemia, Lymphoid / Q000453:epidemiology*; D012621:Seasons; D014481:United States