1. National Health and Environmental Effects Research Laboratory, US Environmental Protection Agency, Office of Research and Development, Research Triangle Park, NC, USA
2. Division of Drinking-Water and Swimming-Pool Hygiene, Umweltbundesamt, Berlin, Germany
3. NHEERL, Oak Ridge Institute for Science and Education Internship/Research Participation Program at the US Environmental Protection Agency, Research Triangle Park, NC, USA
4. North Carolina State University, Raleigh, NC, USA
5. Cellular and Molecular Pathology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
6. Pathogenesis, LLC, Gainesville, FL, USA