title: Problems in studies of human exposure to air pollutants.
mesh_terms: D000397:Air Pollution / Q000032:analysis; D002986:Clinical Trials as Topic; D004781:Environmental Exposure; D006801:Humans; D008722:Methods; D010126:Ozone; D005082:Physical Exertion; D012106:Research; D012119:Respiration; D012129:Respiratory Function Tests
chemical_list: D010126:Ozone