1. Department of Pathology, and Veterinary Faculty, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey.
2. Department of Virology, Veterinary Faculty, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey.
3. California Animal Health and Food Safety Laboratory, Davis Branch, University of California—Davis, Davis, California, USA.
4. Department of Wild Animals and Ecology, Veterinary Faculty, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey.
5. Avian Influenza Group, The Pirbright Institute, Pirbright, Woking, United Kingdom.
6. Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA.