The changing nature of respiratory diseases in industry.
D003226:Congresses as Topic; D004781:Environmental Exposure; D006801:Humans; D009784:Occupational Diseases / Q000139:chemically induced; D009787:Occupational Medicine; D010414:Pennsylvania; D012140:Respiratory Tract Diseases / Q000139:chemically induced / Q000517:prevention & control; D012907:Smoking / Q000150:complications