1. Department of Microbiology and Immunology, Georgetown University School of Medicine, Washington District of Columbia, USA
2. CMRS/Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
3. Biostatistics Research Branch, Division of Clinical Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
4. AIDS and Cancer Virus Program, Leidos Biomedical Research, Inc., Frederick National Laboratory, Frederick, Maryland, USA
5. Clinical Support Laboratory, Leidos Biomedical Research, Inc., Frederick, Maryland, USA
6. Smithers Avanza Toxicology Services, Gaithersburg, Maryland, USA