1. 1Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Hannover, Germany
2. 2Department of Gastroenterology, Hepatology and Endocrinology, Hanover Medical School, Hannover, Germany
3. 3Institute for Virology, University Hospital Düsseldorf, Faculty of Medicine, University Düsseldorf, Düsseldorf, Germany
4. 4Thoraxzentrum Ruhrgebiet, Department of Thoracic Surgery, Evangelisches Krankenhaus, Herne, Germany
5. 5German Center for Infection Research, DZIF, Germany
6. 6Institute for Virology, University of Cologne, Cologne, Germany
7. 7Department of General, Visceral and Transplant Surgery, Hannover Medical School, Hannover, Germany