1. Viral Pathogenesis Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
2. Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
3. Federal University of Rio de Janeiro, COPPE (Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia), Chemical Engineering Program, Rio de Janeiro, Rio de Janeiro, Brazil.
4. Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
5. Structural Informatics Unit, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
6. Electron Microscopy Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA.
7. Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA.
8. Bioqual, Rockville, MD 20852, USA.
9. Translational Medicine Branch, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA.
10. Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA.
11. Biostatistics Research Branch, Division of Clinical Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20852, USA.