1. Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
2. Centre for Infectious Disease Control, National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
3. Epidemiology and public health, Sciensano, Brussels, Belgium
4. National Reference Centre for Salmonella and Shigella, Sciensano, Brussels, Belgium
5. Wageningen Bioveterinary Research (WBVR), Lelystad, the Netherlands