1. Departments of Pharmacology, Temple University School of Medicine, Philadelphia, PA 19140.
2. Departments of Biochemistry, Temple University School of Medicine, Philadelphia, PA 19140.
3. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030.
4. Departments of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA 19140.
5. Fels Institute for Cancer Research and Molecular Biology, Temple University School of Medicine, Philadelphia, PA 19140.
6. Center for Substance Abuse Research, Temple University School of Medicine, Philadelphia, PA 19140.