1. Foreign Animal Disease Diagnostic Laboratory, Animal and Plant Health Inspection Service, U.S. Department of Agriculture, Plum Island Animal Disease Center, Greenport, New York, USA
2. Foreign Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Plum Island Animal Disease Center, Greenport, New York, USA
3. College of Veterinary Medicine, Animal Resources, and Biosecurity, Makerere University, Kampala, Uganda
4. College of Veterinary Medicine, University of Minnesota, St. Paul, Minnesota, USA