Hypothesis: the environment is a major determinant of the immunological sub-type of lymphoma and acute lymphoblastic leukaemia in children.
D000293:Adolescent; D000349:Africa; D000367:Age Factors; D001402:B-Lymphocytes / Q000276:immunology; D044383:Black People; D002648:Child; D002675:Child, Preschool; D004777:Environment; D006801:Humans; D007945:Leukemia, Lymphoid / Q000453:epidemiology* / Q000276:immunology; D008223:Lymphoma / Q000145:classification / Q000453:epidemiology* / Q000276:immunology; D012959:Socioeconomic Factors; D013601:T-Lymphocytes / Q000276:immunology; D014481:United States; D001741:Black or African American