2 Department of Environmental Toxicology, University of California , Davis, CA, USA.
3 Environmental Toxicology and Air Pollution Health Effects Laboratory in the Department of Community and Environmental Medicine, University of California , Irvine, CA, USA.
4 Department of Civil, Construction and Environmental Engineering, North Carolina State University , Raleigh, NC, USA.
5 Western Regional Air Partnership (WRAP), Western States Air Resources Council , Fort Collins, CO, USA.
6 Lane Regional Air Protection Agency , Springfield-Eugene, OR, USA.
7 Meteorology and Measurement, Bay Area Air Quality Management District , San Francisco, CA, USA.
8 Division of Atmospheric Sciences, Desert Research Institute , Reno, NV, USA.
9 State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences , Xi'an, People's Republic of China.
10 Atmospheric Chemistry, University of Washington , Seattle, WA, USA.