1 Research Toxicologist, CDC National Institute for Occupational Safety and Health, Morgantown, WV, USA; Adjunct Professor, Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown, WV, USA.
2 Research Biologist, CDC National Institute for Occupational Safety and Health, Morgantown, WV, USA; Adjunct Assistant Professor, Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV, USA.