1. Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands.
2. Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
3. Institute of Health and Society (IRSS), Université catholique de Louvain, Brussels, Belgium.
4. Centre for Statistics, Hasselt University, Diepenbeek, Belgium.
5. Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.
6. Section of Veterinary Epidemiology, University of Zürich, Zürich, Switzerland.
7. Department of Food Science and Human Nutrition, Michigan State University, East Lansing, United States of America (USA).
8. Food Animal Production Medicine Section, School of Veterinary Medicine UW-Madison, Madison, USA.