1. Labor Dr. Krause und Kollegen MVZ GmbH Kiel Germany
2. Institute for Infection Medicine Kiel University and University Hospital Schleswig‐Holstein Kiel Germany
3. Public Health Department of the State Capital Kiel Kiel Germany
4. National Consultant Laboratory for HAV and HEV Institute of Clinical Microbiology and Hygiene, University Medical Center Regensburg Regensburg Germany