1. Department of Animal and Poultry Health and Nutrition, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
2. Applied Virology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
3. Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
4. Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
5. Central Veterinary Laboratory, Tehran, Iran