1. Institute of Hygiene, University Hospital Muenster, Muenster, Germany
2. Institute of Medical Microbiology, University Hospital Muenster, Muenster, Germany
3. Laboratory of Healthcare Associated Infections, Centre for Infections, Health Protection Agency, London, United Kingdom
4. Faculty of Behavioural Sciences, University of Twente, Enschede, the Netherlands
5. University of Geneva Medical School, Geneva, Switzerland
6. Infection Control Program, University Hospitals of Geneva, Geneva, Switzerland
7. Amphia Hospital, Breda, the Netherlands
8. VU University Medical Centre, Amsterdam
9. Robert Koch Institute, Berlin, Germany
10. Statens Serum Institut (SSI, National Centre for Infectious Diseases), Copenhagen, Denmark
11. Scientific Advice Unit, European Centre for Disease Prevention and Control, Stockholm, Sweden
12. Department of Microbiology, Université Libre de Bruxelles, Hôpital Erasme, Brussels, Belgium (affiliation where the work was started)
13. Department of Infectious Diseases, Università Cattolica Sacro Cuore, Rome, Italy
14. National Reference Centre for Staphylococci, Robert Koch Institute, Wernigerode, Germany