Chronic nonspecific respiratory disease in a movie projectionists union, Boston, 1963-1964.
D000328:Adult; D000368:Aged; D002908:Chronic Disease; D004781:Environmental Exposure; D006801:Humans; D008168:Lung / Q000502:physiology; D008297:Male; D008404:Massachusetts; D008875:Middle Aged; D009040:Motion Pictures; D009784:Occupational Diseases / Q000453:epidemiology*; D012140:Respiratory Tract Diseases / Q000453:epidemiology*; D012907:Smoking; D013147:Spirometry