1. Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
2. Animal Science Unit, Institute for Agricultural and Fisheries Research, Melle, Belgium
3. Schothorst Feed Research, Lelystad, The Netherlands
4. ForFarmers BV, Lochem, The Netherlands
5. Quality Partner s.a., Herstal, Belgium
6. Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
7. Laboratory of Food Microbiology, Department of Food Sciences, Fundamental and Applied Research for Animal & Health, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
8. Veterinary Epidemiology Unit, Department of Reproduction, Obstetrics and Herd Health, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium