1. Public Health Chemistry Branch, Exposure Methods and Measurements Division, National Exposure Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
2. Pharmacokinetics Branch, Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
3. National Research Associateship Programs, Research Triangle Park, North Carolina, USA
4. Oak Ridge Institute for Science and Education, Research Triangle Park, North Carolina, USA
5. SRC Inc., North Syracuse, New York, USA