1. Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany
2. Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
3. Department of Hematology, Haemostaseology, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
4. Institute of Virology, Hannover Medical School, Hannover, Germany
5. Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany
6. Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany