1. Robert Koch-Institute, Department of Infectious Diseases Epidemiology, Berlin, Germany
2. Robert Koch-Institute, Department of Infectious Diseases, National Reference Centre for Salmonella and other Bacterial Enteric Pathogens, Wernigerode, Germany
3. University Hospital of Münster, Consultant Laboratory for HUS, Münster, Germany
4. Postgraduate Training for Applied Epidemiology, Robert Koch Institute, Berlin, Germany
5. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
6. Ministry of Climate Protection, Environment, Agriculture, Nature Conservation and Consumer Protection of the state of North Rhine-Westphalia, Düsseldorf, Germany
7. North Rhine-Westphalia, Centre for Health, Department of Infectiology and Hygiene, Münster, Germany