title: Smelter workers study defective.
mesh_terms: D006801:Humans; D008669:Metallurgy; D009784:Occupational Diseases / Q000139:chemically induced / Q000175:diagnosis*; D012140:Respiratory Tract Diseases / Q000139:chemically induced / Q000175:diagnosis*; D013458:Sulfur Dioxide / Q000009:adverse effects*
chemical_list: D013458:Sulfur Dioxide