1. Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, North Carolina 27599, United States
2. Curriculum in Toxicology, University of North Carolina at Chapel Hill, North Carolina, United States
3. Hitachi High-Technologies, Tokyo, Japan
4. Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
5. Department of Pharmacology and Toxicology, Virginia Commonwealth University Medical Center, Richmond, Virginia 23298, United States