Hai-jiao WANG ; Eva HNIZDO ; Yan-fei GUO
Chinese Journal of Industrial Hygiene and Occupational Diseases 2008;26(1):58-60
Air Pollutants, Occupational ; adverse effects ; analysis ; Dose-Response Relationship, Drug ; Dust ; analysis ; Humans ; Occupational Exposure ; adverse effects ; analysis ; Silicon ; adverse effects ; analysis ; Silicosis ; epidemiology ; United States ; epidemiology