1. Disease Surveillance Laboratory Department of Epidemiology and Public Health University of Veterinary and Animal Sciences Lahore Pakistan
2. Department of Infectious Diseases World Health Organization Collaborating Center for Studies on the Ecology of Influenza in Animals and Birds St. Jude Children's Research Hospital Memphis TN USA
3. Exotic and Emerging Avian Viral Diseases Research Unit Southeast Poultry Research Laboratory U.S. National Poultry Research Center U.S. Department of Agriculture, Agricultural Research Service Athens GA USA
4. Department of Clinical Medicine and Surgery University of Veterinary and Animal Sciences Lahore Pakistan
5. Department of Pathobiology and Veterinary Science University of Connecticut Storrs CT USA