1. Institute for Agricultural, Fisheries and Food Research, Scheldeweg 68, 9090 Melle, Belgium
2. Department of Veterinary and Biosciences, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium
3. Sanluc International NV, Langerbruggekaai 1, 9000 Gent, Belgium
4. Department of, Pathobiology, Pharmacology and Zoological Medicine, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium