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\bibitem{Stranger_etal2009} {\textquotedblleft}\textit{Particulate matter and gaseous pollutants in residences in Antwerp, Belgium}{\textquotedblright}. Stranger M, Potgieter-Vermaak SS, Van Grieken R, The science of the total environment \textbf{407}, 1182 (2009).   http://doi.org/10.1016/J.SCITOTENV.2008.10.019

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