1. First Department of Internal Medicine; University of Cologne; Cologne Germany
2. Department of Haematology; Oncology and Palliative Medicine; Harlaching Hospital; Munich Germany
3. IPM Study Center; Hamburg and University of Schleswig Holstein, Campus Kiel; Hamburg Germany
4. Department of Medicine I; University Medical Centre Hamburg-Eppendorf; Hamburg Germany
5. Department of Gastroenterology; Hepatology and Infectiology; University of Düsseldorf; Düsseldorf Germany
6. Department of Internal Medicine IV; University of Munich; Munich Germany
7. Private Practice of Rheumatology and Infectious Diseases; Freiburg Germany
8. Department of Internal Medicine I; University of Bonn; Bonn Germany
9. Department of Medicine III; University of Frankfurt; Frankfurt Germany
10. Department of General Medicine; Gastroenterology and Infectious Diseases; Augustinerinnen Hospital; Cologne Germany
11. Department of Infectious Diseases; Vivantes Auguste-Viktoria-Hospital; Berlin Germany
12. Department of Dermatology; University of Essen; Essen Germany
13. German Centre for Infection Research (DZIF); Cologne Germany