1. Instituto de Tecnologia Quimica e Biologica, Universidade Nova de Lisboa, Oeiras, Portugal
2. Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark
3. Department of Microbiology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
4. Department of Biology and Biochemistry, University of Bath, Bath, United Kingdom
5. Laboratoire Central de Microbiologie, Hôpital Edouard Herriot, Lyon, France
6. Institut für Hygiene, University Hospital Münster, Münster, Germany
7. Department of Periodontology, University Hospital Münster, Münster, Germany
8. Center for Infections, Health Protection Agency, London, United Kingdom
9. Diagnostic Laboratory for Infectious Diseases, National Institute of Public Health and the Environment, Bilthoven, The Netherlands
10. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
11. Robert-Koch-Institut, Wernigerode, Germany
12. Institut für Hygiene und Microbiologie, University Hospital Würzburg, Würzburg, Germany
13. State Key Laboratory of Infectious Diseases Prevention and Control, National Institute for Communicable Disease Prevention and Control, Beijing, People's Republic of China