1. Center for Public Health and Environmental Assessment, US Environmental Protection Agency, Chapel Hill, NC 27709, USA
2. Department of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
3. Oak Ridge Associated Universities at the US Environmental Protection Agency, Chapel Hill, NC 27709, USA
4. Department of Environmental Sciences and Engineering, Gillings School of Public Health, University of North Carolina, Chapel Hill, NC 27599, USA
5. Institute for Environmental Health Solutions, University of North Carolina, Chapel Hill, NC 27599, USA
6. Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC 27710, USA
7. Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, Durham, NC 27710, USA
8. Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC 27710, USA
9. Cooperative Studies Program Epidemiology Center, Durham Veterans Affairs Medical Center, Durham, NC 27705, USA
10. Division of Cardiology, Department of Medicine, School of Medicine, Duke University, Durham, NC 27710, USA