1. Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853
2. Cambridge Infectious Diseases Consortium, Department of Veterinary Medicine, Cambridge CB3 0ES, United Kingdom
3. Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, United Kingdom
4. Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853
5. Institute für Virologie, Freie Universität Berlin, Philippstrasse 13, 10115 Berlin, Germany
6. Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853
7. Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, State College, Pennsylvania 16802
8. Fogarty International Center, National Institutes of Health, Bethesda, Maryland 20892