1. Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, Bangladesh
2. French Agency for Food, Environmental and Occupational Health Safety (ANSES) Ploufragan-Plouzané-Niort Laboratory, Avian and Rabbit Epidemiology and Welfare Unit, OIE Reference Laboratory for Infectious Bursal Disease Ploufragan, France
3. Faculty of Veterinary Medicine, University of Leipzig, Institute for Virology, Leipzig, Germany