title: Environmental factors.
authors.affiliation: Department of Epidemiology, McGill University, Montreal, Quebec, Canada.
authors.forename: M R
authors.initials: MR
authors.lastname: Becklake
authors.forename: P
authors.initials: P
authors.lastname: Ernst
mesh_terms: D001249:Asthma / Q000453:epidemiology / Q000209:etiology*; D002648:Child; D004785:Environmental Pollutants / Q000009:adverse effects*; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000150:complications* / Q000175:diagnosis; D008019:Life Style; D008297:Male; D015995:Prevalence; D012307:Risk Factors; D017678:Sex Distribution
chemical_list: D004785:Environmental Pollutants