1. Infection and Immunity, Division of Clinical Science, St George's University of London, London, United Kingdom
2. Department of Medical Microbiology and Infectious Diseases, Erasmus Medical Centre, Rotterdam, The Netherlands
3. Laboratoire de Référence MRSA-Staphylocoques, Service de Microbiologie, Université Libre de Bruxelles, Hôpital Erasme, Brussels, Belgium
4. Department of Microbiological Surveillance and Research, Statens Serum Institut, Copenhagen, Denmark
5. Division of Infectious Diseases, Department of Medicine, Columbia University Medical Center, New York, New York, USA