1. St. Jude Children’s Research Hospital, Department of Infectious Diseases, Memphis, TN 38105, USA
2. J. Craig Venter Institute (JCVI), Rockville, MD 20850, USA
3. Center for Bioinformatics and Computational Biology, University of Maryland, College Park, MD 20742, USA
4. Conserve Wildlife Foundation of New Jersey, Bordentown, NJ 08505, USA
5. Endangered and Nongame Species, New Jersey Division of Fish and Wildlife, Trenton, NJ 08332, USA
6. Environment Canada, Canadian Wildlife Service, Edmonton T6B 1K5, AB, Canada
7. Current address: Virology Surveillance and Diagnosis Branch, Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA