Affiliation: | 1. Central Veterinary Institute of Wageningen UR, Department of Virology, P.O. Box 65, 8200 AB Lelystad, The Netherlands;2. Department of Farm Animal Health, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL Utrecht, The Netherlands;3. National Centre for Animal Health, Department of Livestock, Ministry of Agriculture and Forests, Thimphu, Bhutan |