title: Asthma and air toxics: another potential source of positive bias.
authors.forename: Francis P
authors.initials: FP
authors.lastname: Boscoe
authors.forename: Thomas O
authors.initials: TO
authors.lastname: Talbot
mesh_terms: D000393:Air Pollutants / Q000506:poisoning*; D001249:Asthma / Q000453:epidemiology*; D015982:Bias; D004781:Environmental Exposure / Q000009:adverse effects*; D006798:Housing / Q000706:statistics & numerical data; D006801:Humans; D012959:Socioeconomic Factors; D001335:Vehicle Emissions / Q000506:poisoning*
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions