1. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
2. Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
3. Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
4. Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA.
5. Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA.
6. Department of Microbiology, Infectiology, and Immunology, Université de Montréal, Faculty of Medicine, and Centre de Recherche du CHUM (Centre hospitalier de l’Université de Montréal), Montreal, Quebec H2X 0A9, Canada.
7. Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
8. School of Medicine and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, CA 92110, USA.