%0 Journal Article %K Exposure %K Apartments %K China %K Particle number %K Ultrafine %A Nasim A Mullen %A Cong Liu %A Yinping Zhang %A Shuxiao Wang %A William W Nazaroff %B Atmospheric Environment %D 2010 %G eng %N 40 %P 7574-7582 %R 10.1016/j.atmosenv.2010.07.060. %T Ultrafine Particle Concentrations and Exposures in Four High-Rise Beijing Apartments %V 45