1. Novartis Vaccines and Diagnostics, Cambridge, MA 02139, USA.
2. The J. Craig Venter Institute, Rockville, MD 20850, USA.
3. The J. Craig Venter Institute, San Diego, CA 92121, USA.
4. Synthetic Genomics Inc., La Jolla, CA 92037, USA.
5. Biomedical Advanced Research and Development Authority, U.S. Department of Health and Human Services, Washington, DC 20201, USA.
6. Institut für Virologie, Philipps-Universität Marburg, D-35032 Marburg, Germany.
7. Novartis Vaccines and Diagnostics, 53100 Siena, Italy.
8. Novartis Vaccines and Diagnostics, Holly Springs, NC 25740, USA.