1. Department I of Internal Medicine, Division of Infectious Diseases, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
2. Centre for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne , Cologne , Germany
3. Department of Anaesthesiology, Intensive Care, Emergency and Pain Medicine, University Hospital Wuerzburg , Wuerzburg , Germany
4. Institute of Virology, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
5. Evidence-Based Medicine, Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
6. Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität of Berlin , Berlin , Germany