1. State Office for Health and Social Affairs (LAGeSo), Berlin, Germany
2. Robert Koch Institute, Berlin, Germany
3. Local Public Health Authority, Berlin Mitte, Germany
4. National Consultant Laboratory for Hepatitis A and Hepatitis E, Institute of Clinical Microbiology and Hygiene, University Medical Center Regensburg, Regensburg, Germany
5. Bavarian Health and Food Safety Authority (LGL), Oberschleißheim, Germany