1. Department of Pathobiology, Pharmacology and Zoological Medicine, Ghent University, 9820 Merelbeke, Belgium
2. Department of Internal Medicine, Reproduction and Population Medicine, Ghent University, 9820 Merelbeke, Belgium
3. Royal GD (Animal Health Service), 7418 EZ Deventer, The Netherlands
4. Animal Health Service-Flanders (DGZ), 8820 Torhout, Belgium
5. Pathology Department, Arsia Asbl, 5590 Ciney, Belgium