CHRONIC RESPIRATORY DISEASE IN POSTAL EMPLOYEES. EPIDEMIOLOGIC SURVEY OF A GROUP EMPLOYED IN ONE BUILDING.
D001991:Bronchitis; D002908:Chronic Disease; D003371:Cough; D003625:Data Collection; D004813:Epidemiology; D006801:Humans; D008824:Michigan; D011177:Postal Service; D012140:Respiratory Tract Diseases; D012907:Smoking
BRONCHITIS; COUGH; EPIDEMIOLOGY; MICHIGAN; POSTAL SERVICE; RESPIRATORY TRACT DISEASES; SMOKING