1. Institute of Public Health—Food Section, 1050 Brussels, Belgium
2. Ministry of the Flemish Community, Center for Agricultural Research—Department Animal Product Quality, 9090 Melle, Belgium
3. Department of Microbiology, Institute of Biology, University of Bialystok, 15-950 Bialystok, Poland
4. Department of Intensive Care Medicine
5. Department of Paediatrics
6. Department of Emergency Medicine, University Hospital Gasthuisberg, 3000 Leuven, Belgium
7. Department of Paediatrics, Ziekenhuis Maas en Kempen, Maaseik, Belgium
8. Federal Agency for the Safety of the Food Chain, Brussels, Belgium
9. Laboratory of Food and Environmental Microbiology, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium