1. Department of Biochemistry and Molecular Biology, Drexel University College of Medicine, Philadelphia, Pennsylvania 19102, United States
2. School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania 19102, United States
3. Laboratory of Retrovirology, The Rockefeller University, New York, New York 10065, United States
4. Howard Hughes Medical Institute, The Rockefeller University, New York, New York 10065, United States
5. Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, Pennsylvania 19102, United States
6. The Vaccine and Immunotherapy Center, Wistar Institute, Philadelphia, Pennsylvania 19104, United States
7. Department of Microbiology and Immunology, Center for Molecular Virology & Translational Neuroscience, Institute for Molecular Medicine & Infectious Disease, Philadelphia, Pennsylvania 19102, United States
8. Molecular Targets Program, Center for Cancer Research, National Cancer Institute, NIH, Frederick, Maryland 21702, United States
9. Natural Products Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick, Maryland 21702, United States