What causes leukemia?
D000818:Animals; D004195:Disease Models, Animal; D006801:Humans; D007165:Immunosuppression Therapy; D007938:Leukemia / Q000209:etiology* / Q000276:immunology; D008223:Lymphoma; D051379:Mice; D008819:Mice, Nude; D013601:T-Lymphocytes / Q000276:immunology