1. Transplantation Center; University Hospital (CHUV) and University of Lausanne; Lausanne Switzerland
2. Infectious Diseases Service; University Hospital (CHUV) and University of Lausanne; Lausanne Switzerland
3. Institute for Clinical Epidemiology and Biostatistics; University Hospital of Basel; Basel Switzerland
4. Division of Infectious Diseases and Hospital Epidemiology; University Hospital; University of Zurich; Zürich Switzerland
5. Department of Infectious Diseases; Bern University Hospital; University of Bern; Bern Switzerland
6. Transplant Infectious Diseases Unit; University Hospital Geneva; Geneva Switzerland
7. Division of Infectious Diseases and Hospital Epidemiology; University Hospital of Basel; Basel Switzerland
8. Division of Infectious Diseases and Hospital Hygiene; Kantonsspital St. Gallen; St. Gallen Switzerland
9. Division of Pneumology; Department of Medicine; University Hospital Geneva; Geneva Switzerland
10. Transplantation & Clinical Virology; Department Biomedicine (Haus Petersplatz); University of Basel; Basel Switzerland
11. Institute of Microbiology; University Hospital (CHUV) and University of Lausanne; Lausanne Switzerland