1. Wildlife Conservation Society, Bronx Zoo, Bronx, New York, USA
2. Department of Population Medicine and Diagnostic Sciences, Animal Health Diagnostic Center, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
3. Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
4. National Veterinary Services Laboratories, Animal and Plant Health Inspection Service (APHIS), U.S. Department of Agriculture (USDA), Ames, Iowa, USA
5. Department of Pathobiology, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
6. Centers for Disease Control and Prevention, Atlanta, Georgia, USA
7. Zoological Pathology Program, College of Veterinary Medicine, University of Illinois, Brookfield, Illinois, USA
8. Chicago Zoological Society, Chicago, Illinois, USA
9. New York State Department of Agriculture and Markets, Albany, New York, USA
10. New York City Department of Health and Mental Hygiene, Queens, New York, USA