1. AIDS Imaging Research Section, Division of Clinical Research, National Institute of Allergy and Infectious Diseases (NIAID), NIH, Bethesda, MD 20892, USA.
2. AIDS and Cancer Virus Program, Frederick National Laboratory, Frederick, MD 21702, USA.
3. Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA.
4. Applied/Developmental Research Directorate, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA.
5. Battelle/Charles River–Integrated Research Facility, NIAID Frederick, Frederick, MD 21702, USA.
6. MassBiologics, University of Massachusetts Medical School, Boston, MA 02126, USA.
7. Laboratory of Immunoregulation, Division of Intramural Research, NIAID, NIH, Bethesda, MD 20892, USA.
8. Biostatistics Research Branch, Division of Clinical Research, NIAID, NIH, Bethesda, MD 20852, USA.