1. Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079
2. Department of Biological and Medical Chemistry, Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine
3. Department of Experimental Pharmacology and Toxicology, University of Port-Harcourt, Rivers State, Nigeria
4. Office of Regulatory Affairs, Arkansas Regional Laboratory, U.S. Food and Drug Administration, Jefferson, Arkansas 72079