1. Department for Infectious Disease Epidemiology, Governmental Institute of Public Health of Lower Saxony, Hannover, Germany
2. European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
3. Postgraduate Training for Applied Epidemiology (PAE, German Field Epidemiology Training Programme), Robert Koch Institute, Berlin, Germany
4. Institute of Clinical Microbiology and Hygiene, University of Regensburg Medical Center, German Consultant Laboratory for Hepatitis A and Hepatitis E, Regensburg, Germany
5. Lower Saxony State Office for Consumer Protection and Food Safety (LAVES), Institute for Fish and Fishery Products, Cuxhaven, Germany
6. Lower Saxony State Office for Consumer Protection and Food Safety (LAVES), Oldenburg, Germany