1. Institute of Virology, EU Reference Laboratory for Classical Swine Fever; Hannover Veterinary School; Bunteweg 17 D-30559 Hannover Germany
2. Institute of Pathology; Hannover Veterinary School; Bunteweg 17 D-30559 Hannover Germany
3. Clinic for Swine and Small Ruminants; Hannover Veterinary School; Bischofsholer Damm 15 Hannover Germany