1. Institute of Diagnostic Virology, Friedrich Loeffler Institute, Greifswald-Riems, Germany
2. National Laboratory for Veterinary Quality Control on Poultry Production, Animal Health Research Institute, Giza, Egypt
3. Istituto Zooprofilattico Sperimentale delle Venezie, Padua, Italy
4. Institute of Immunology, Friedrich Loeffler Institute, Greifswald-Riems, Germany
5. Central Veterinary Research Laboratory (CVRL), Dubai, United Arab Emirates
6. Boehringer Ingelheim, Dubai, United Arab Emirates
7. Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
8. Birds and Rabbits Medicine Department, Faculty of Veterinary Medicine, Sadat City University, Egypt
9. Central Veterinary Laboratory, Ministry of Agriculture, Baghdad, Iraq