1. Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
2. Oak Ridge Institute for Science and Education Research Participation Program, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
3. ICF International Inc, Durham, NC, USA
4. Department of Environmental Sciences and Engineering, Gilling’s School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA