Is non-Hodgkin's lymphoma a single entity?
D001402:B-Lymphocytes / Q000276:immunology; D002051:Burkitt Lymphoma / Q000209:etiology / Q000276:immunology; D002648:Child; D006801:Humans; D008223:Lymphoma / Q000209:etiology / Q000276:immunology / Q000628:therapy; D013601:T-Lymphocytes / Q000276:immunology