Clusters of leukemia and Hodgkin's disease.
D000293:Adolescent; D002648:Child; D004781:Environmental Exposure; D006689:Hodgkin Disease / Q000453:epidemiology*; D006801:Humans; D007087:Illinois; D007938:Leukemia / Q000453:epidemiology* / Q000209:etiology; D009518:New York