1. Department of Pathology University of Veterinary Medicine Hannover Hannover Germany
2. Pathology Unit Department of Veterinary Medicine University of Parma Parma Italy
3. Dipartimento di Medicina Veterinaria (DIMEVET) Universitá degli Studi di Milano Lodi Italy
4. Department of Physiological Chemistry University of Veterinary Medicine Hannover Hannover Germany
5. TWINCORE Centre for Experimental and Clinical Infection Research HannoverHannover GermanyGermany
6. Research Center for Emerging Infections and Zoonoses (RIZ) University of Veterinary Medicine Hannover Hannover Germany