title: Polarcardiographic study of hospital staff--abnormalities found in smokers.
mesh_terms: D000328:Adult; D000367:Age Factors; D001955:British Columbia; D003201:Computers; D005260:Female; D006801:Humans; D008297:Male; D008505:Medical Staff, Hospital; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis / Q000453:epidemiology; D012737:Sex Factors; D012907:Smoking; D014672:Vectorcardiography