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目的 Todetermineifthelungfunctiongrowthcouldbeanoninvasivepredictorofasthmapersistenceandcouldbeusefulinthepopulation-basedstudiesfortestingindependenteffectsofmultipleenvironmeantalpollutants.Wehypothesizeddifferentdomesticairborneblackcarbonexposuremightresultinadifferentlungfunctiongrowthamongchildrenespeciallythosewithasthmabetweenage7-8to10-11fromdifferentasthmaprevaleceneighborhoodsinNewYorkCity.