Guidelines as to what constitutes an adverse respiratory health effect, with special reference to epidemiologic studies of air pollution.
D000397:Air Pollution / Q000009:adverse effects*; D004782:Environmental Health; D004812:Epidemiologic Methods; D006801:Humans; D012140:Respiratory Tract Diseases / Q000209:etiology*; D012955:Societies, Medical; D014481:United States