1. Laboratory of Molecular Immunology, Rockefeller University, New York, NY 10065, USA.
2. Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
3. Department of Immunology and Microbial Science, Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, and International AIDS Vaccine Initiative Neutralizing Antibody Center, Scripps Research Institute, La Jolla, CA 92037, USA.
4. Department of Chemistry and Biochemistry, University of Maryland, 8051 Regents Drive, College Park, MD 20742, USA.
5. Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02129, USA.
6. Department of Medical Microbiology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
7. Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
8. Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA.