1. Division of Infectious Diseases & Hospital Epidemiology; University Hospital Basel; Basel Switzerland
2. Basel Institute for Clinical Epidemiology & Biostatistics; University Hospital Basel; Basel Switzerland
3. Division of Infectious Diseases & Hospital Hygiene; Kantonsspital St. Gallen; St. Gallen Switzerland
4. Clinic of Infectious Diseases; Inselspital; Bern University Hospital and University of Bern; Bern Switzerland
5. Clinic of Internal Medicine & Infectious Diseases; Clinica Luganese; Lugano Switzerland
6. Infectious Diseases Service; University Hospital of Lausanne (CHUV); Lausanne Switzerland
7. Division of Infectious Diseases & Hospital Epidemiology; University Hospital; University of Zürich; Zürich Switzerland
8. Service of Transplantation; Department of Surgery; University Hospital Geneva; Geneva Switzerland
9. Division of Infectious Diseases and Hospital Epidemiology; University Children's Hospital Zürich; Zürich Switzerland