Smelter workers study defective.
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*
D013458:Sulfur Dioxide