1. Department of Farm Animals and Veterinary Public Health, University Clinic for Ruminants, University of Veterinary Medicine, Veterinaerplatz 1, Vienna, A-1210, Austria
2. Department of Pathobiology, Histology and Embryology, Institute of Anatomy, University of Veterinary Medicine Vienna, Veterinaerplatz 1, Vienna A-1210, Austria
3. Teaching and Research Farm Kremesberg, University of Veterinary Medicine Vienna, Vienna, A-1210, Austria