1. French Institute of Public Health Surveillance, Department of Coordination of Alerts and Regions, Regional office in Aquitaine, Bordeaux, France
2. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
3. Department of Epidemiology, Robert Koch-Institut, Berlin, Germany
4. Department of Infectious Disease Epidemiology, National Institute of Public Health, Oslo, Norway
5. Consultant epidemiologist (independent), Brussels, Belgium
6. Meningococcal Reference Laboratory, Austrian Agency for Food and Health Safety, Graz, Austria
7. University of Bristol, Bristol, United Kingdom