1. Department of Anaesthesiology and Intensive Care; University of Leipzig Medical Center; Leipzig Germany
2. Department of Intensive Care Medicine and Intermediate Care; Medical Faculty, RWTH Aachen University; Aachen Germany
3. Institute of General Practice; Medical Faculty of the Heinrich-Heine-University Düsseldorf; Düsseldorf Germany
4. Cochrane Haematology, Department I of Internal Medicine; University of Cologne, Faculty of Medicine and University Hospital Cologne; Cologne Germany
5. Centre for Biological Threats and Special Pathogens (ZBS), Strategy and Incident Response, Clinical Management and Infection Control; Robert Koch Institute; Berlin Germany
6. Department of Infectious Diseases and Respiratory Medicine; Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin; Berlin Germany