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This is an update request for the document Associations between ambient air pollutant mixtures and pediatric asthma emergency department visits in three cities: a classification and regression tree approach
by Katherine Gass, Mitch Klein, Stefanie E. Sarnat, Andrea Winquist, Lyndsey A. Darrow, W. Dana Flanders, Howard H. Chang, James A. Mulholland, Paige E. Tolbert and Matthew J. Strickland
Your paper was deposited in MUCC (Crossref)
and appears online at https://ehjournal.biomedcentral.com/track/pdf/10.1186/s12940-015-0044-5?site=ehjournal.biomedcentral.com
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