1. Danish Food and Veterinary Research Institute, DK-1790 Copenhagen, Denmark
2. Federal Institute for Risk Assessment, National Salmonella Reference Laboratory, D-12277 Berlin
3. Institute of Veterinary Food Science, Justus Liebig University Giessen, D-35392 Giessen
4. DEFRA Central Science Laboratory, Sand Hutton, United Kingdom
5. Institute for Milk Hygiene, Milk Technology and Food Science, 1210 Vienna, Austria
6. National Food Agency, 94700 Maisons Alfort, Paris, France