title: Follow-up chest radiographs in Vietnam veterans: are they useful?
mesh_terms: D004147:Dioxins / Q000009:adverse effects; D005500:Follow-Up Studies; D006801:Humans; D008171:Lung Diseases / Q000139:chemically induced / Q000000981:diagnostic imaging*; D011859:Radiography; D014728:Veterans; D014744:Vietnam
chemical_list: D004147:Dioxins