Epidemiologic methods for the study of occupational asthma. Current problems and solutions.
Cullen
M R
MR
Yale Occupational and Environmental Medicine Program, Yale University School of Medicine, New Haven, CT 06510, USA.
D001249:Asthma / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D009784:Occupational Diseases / Q000453:epidemiology* / Q000209:etiology; D012307:Risk Factors; D014481:United States