1. Department of Pharmacology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
2. Department of Biochemistry, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
3. Fakultät für Chemie, Universität Konstanz, Konstanz, Germany.
4. Department of Biostatistics/Physiology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
5. Department of Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
6. Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
7. Center for Substance Abuse Research, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.
8. Fels Institute for Cancer Research and Molecular Biology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140.