1. Department of Internal Medicine, Infectious Diseases, University Hospital Frankfurt, Goethe University Frankfurt , Frankfurt am Main , Germany
2. Department I of Internal Medicine, Faculty of Medicine and University Hospital Cologne, University of Cologne , Cologne , Germany
3. Danestat Consulting Limited , Macclesfield , UK
4. Infection Control Program, Geneva University Hospitals and Faculty of Medicine , Geneva , Switzerland
5. Laboratory of Medical Microbiology, Vaccine & Infectious Disease Institute, University of Antwerp , Antwerp , Belgium
6. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University , Utrecht , the Netherlands