1. Avian Health and Food Safety Laboratory, Washington Animal Disease Diagnostic Laboratory, Washington State University, 2607 W. Pioneer, Puyallup, WA 98371
2. Cutler and Associates, 3562 Jomar Drive, Napa, CA 94558
3. The Roslin Institute and The Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, EH25 9RG Scotland, United Kingdom