RESPIRATORY SYMPTOMS AND TESTS AMONG NEW YORK POSTMEN.
D006306:Health Surveys; D006801:Humans; D009518:New York; D009787:Occupational Medicine; D012129:Respiratory Function Tests; D012140:Respiratory Tract Diseases; D013223:Statistics as Topic
HEALTH SURVEYS; INDUSTRIAL MEDICINE; NEW YORK; RESPIRATORY FUNCTION TESTS; RESPIRATORY TRACT DISEASES; STATISTICS