1. Division of Infectious Diseases and Hospital Epidemiology, University of Basel and University Hospital Basel, Basel, Switzerland
2. Clinical Bacteriology and Mycology, University of Basel and University Hospital Basel, Basel, Switzerland
3. Clinical Trial Unit, University Hospital Basel, Basel, Switzerland
4. Department of Infectious Diseases, Bern University Hospital and University of Bern, Bern, Switzerland
5. Clinical Microbiology, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
6. Division of Infectious Diseases and Hospital Epidemiology, University Hospital Geneva, Geneva, Switzerland
7. Division of Laboratory Medicine, Laboratory of Bacteriology, University Hospital Geneva and University of Geneva, Geneva, Switzerland
8. Division of Infectious Diseases and Hospital Epidemiology, Cantonal Hospital St Gallen, St Gallen, Switzerland
9. Center for Laboratory Medicine, St Gallen, Switzerland
10. Clinic of Infectious Diseases and Hospital Hygiene, Cantonal Hospital Aarau, Aarau, Switzerland
11. Clinical Microbiology, Cantonal Hospital Aarau, Aarau, Switzerland
12. Division of Infectious Diseases and Hospital Epidemiology, University of Zurich and University Hospital Zurich, Zurich, Switzerland
13. Clinical Microbiology, University Hospital Zurich, Zurich, Switzerland
14. Infectious Diseases Service and Institute of Microbiology, Lausanne University Hospital, Lausanne, Switzerland