1. Laboratory of Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke B-9820, Belgium
2. Department of Biosystems, Laboratory of Livestock Physiology and Immunology, Faculty of Bioscience Engineering, Kasteelpark Arenberg 30, Heverlee B-3001, Belgium
3. Department of Medicine and Clinical Biology of Small Animals, Ghent University, Salisburylaan 133, Merelbeke B-9820, Belgium
4. Department of Physiology and Biometry, Ghent University, Salisburylaan 133, Merelbeke B-9820, Belgium
5. Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Harelbekestraat 72, Ghent B-9000, Belgium