1. Transplant Infectious Diseases Unit; University Hospitals of Geneva and Faculty of Medicine; Geneva Switzerland
2. Department of Infectious Diseases; Bern University Hospital; University of Bern; Bern Switzerland
3. Division of Infectious Diseases and Hospital Epidemiology; University and University Hospital of Basel; Basel Switzerland
4. Division of Infectious Diseases and Hospital Epidemiology; University Hospital of Zurich; Zurich Switzerland
5. Division of Infectious Diseases and Hospital Epidemiology; Cantonal Hospital St Gallen; St Gallen Switzerland
6. Service of Infectious Diseases and Transplantation Center; University Hospital of Lausanne; Lausanne Switzerland