Emphysema in coalworkers.
D003032:Coal Mining; D005107:Explosions; D006801:Humans; D008297:Male; D009585:Nitrogen Dioxide / Q000506:poisoning*; D009784:Occupational Diseases / Q000139:chemically induced*; D011656:Pulmonary Emphysema / Q000139:chemically induced*
D009585:Nitrogen Dioxide