title: Sulfur dioxide exposure in Portland cement plants.
mesh_terms: D000395:Air Pollutants, Occupational / Q000009:adverse effects*; D003252:Construction Materials; D006801:Humans; D007484:Iowa; D009784:Occupational Diseases / Q000139:chemically induced*; D009825:Oklahoma; D013458:Sulfur Dioxide / Q000009:adverse effects*
chemical_list: D000395:Air Pollutants, Occupational; D013458:Sulfur Dioxide