1. Reference Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Agriculture Research Center (ARC), Giza, Egypt
2. Department of Birds and Rabbits Medicine, Faculty of Veterinary Medicine, University of Sadat City, Menoufiya, Egypt
3. Zoonosis Science Center, Department of Medical Biochemistry and Microbiology, Uppsala University Uppsala, Sweden
4. Unaffiliated Poultry Consultant, Giza, Egypt
5. Department of Poultry Diseases, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
6. Infectious Bursal Disease Virus group, The Pirbright Institute, Surrey, UK