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