title: Are further epidemiologic studies of leukemia needed?
mesh_terms: D004785:Environmental Pollutants / Q000009:adverse effects; D004812:Epidemiologic Methods; D006801:Humans; D007938:Leukemia / Q000145:classification / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D012190:Retroviridae
chemical_list: D004785:Environmental Pollutants