1. Nelson Institute of Environmental Medicine, New York University School of Medicine, Tuxedo Park, New York, USA
2. Department of Environmental Health, University of Washington, Seattle, Washington, USA
3. Department of Statistics, and
4. Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
5. Department of Civil and Environmental Engineering, Southern California University, Los Angeles, California, USA
6. Center for Air Resources Engineering and Science, Clarkson University, Potsdam, New York, USA
7. Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts USA
8. Department of Civil and Environmental Engineering, and
9. Department of Biostatistics, University of Washington, Seattle, Washington, USA
10. National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Chapel Hill, North Carolina, USA
11. National Center for Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
12. Institute of Epidemiology, Focus Network Aerosols and Health, National Research Center for Environment and Health (GSF), Neuherberg, Germany