1. Curriculum in Toxicology, University of North Carolina, Chapel Hill, North Carolina.
2. Exposure Methods and Measurements Division, NERL/ORD, United States Environmental Protection Agency, Research Triangle Park, North Carolina.
3. Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina.
4. Environmental Public Health Division, NHEERL/ORD, United States Environmental Protection Agency, Research Triangle Park, North Carolina.