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. Department of Veterinary Medicine and Public Health, Sokoine University of Agriculture, Morogoro, Tanzania
4. Tanzania Veterinary Laboratory Agency, Mtwara, Tanzania
5. Texas A&M Veterinary Medical Diagnostic Laboratory, College Station, Texas, USA