1. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen, St Gallen, Switzerland
2. Hirslanden Clinic, Zurich, Switzerland
3. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital Baden, Baden, Switzerland
4. Division of Infectious Diseases and Hospital Epidemiology, Thurgau Hospital Group, Muensterlingen, Switzerland
5. Swiss National Centre for Infection Prevention (Swissnoso), Berne, Switzerland
6. Department of Infectious Diseases and Hospital Epidemiology, Children’s Hospital of Eastern Switzerland, St Gallen, Switzerland