1. National Exposure
Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States
2. National
Center
for Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States
3. U.S. Environmental
Protection Agency, Research Triangle Park, North Carolina 27709, United States
4. Biomathematics
Program, Department of Mathematics, North Carolina State University, Raleigh, North Carolina 27695, United States
5. Office of Air
Quality Planning and Standards, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States
6. National Health
and Environmental
Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27709, United States
7. Helmholtz
Zentrum Muenchen, German Research Center for Environmental Health, Institute of Epidemiology II, Neuherberg, Germany
8. Environmental
Health Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
9. Department
of Environmental Sciences, Rutgers University, New Brunswick, New Jersey 08901, United States