1. Service de Bactériologie-Hygiène, CHU de Nantes, Nantes - France
2. Department of Microbiology, Reference Laboratory of Catalunya, Barcelona - Spain
3. Infectious Disease Clinic, Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Perugia - Italy
4. Division of Orthopedic Surgery and Traumatology, Department of Surgery and Anesthesiology, University Hospital Lausanne, Lausanne - Switzerland
5. Service of Infectious Diseases, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne - Switzerland