1. Exotic and Emerging Avian Viral Disease Research Unit, Southeast Poultry Research Laboratory, U.S. National Poultry Research Center, ARS, USDA, Athens, Georgia, USA
2. National Scientific Center Institute of Experimental and Clinical Veterinary Medicine, Kharkiv, Ukraine
3. Georgia Poultry Laboratory Network, Gainesville, Georgia, USA
4. Biotechnology Research Institute, Kenya Agricultural and Livestock Research Organization, Loresho, Nairobi, Kenya