1. Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Duke University School of Medicine, Durham, North Carolina, USA
2. Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
3. AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
4. Department of Surgery, Duke University School of Medicine, Durham, North Carolina, USA