title: Relationship between air pollutant levels and hospital admissions in Southern Ontario.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000393:Air Pollutants / Q000032:analysis*; D002648:Child; D002675:Child, Preschool; D004812:Epidemiologic Methods; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009017:Morbidity; D009864:Ontario; D010343:Patient Admission / Q000639:trends*; D012140:Respiratory Tract Diseases / Q000139:chemically induced; D012621:Seasons
chemical_list: D000393:Air Pollutants