1. Department of Infectious, Parasitic and Immune-mediated Diseases, Istituto Superiore di Sanità, Rome, Italy
2. Anaerobe Reference Laboratory, NPHS Microbiology Cardiff, University Hospital of Wales, Cardiff CF14 4XW, UK
3. Microbiology Unit, Hôpital Saint-Antoine, Paris, France
4. Microbiology Unit, Université Catholique de Louvain, Bruxelles, Belgium
5. Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
6. Department of Medical Microbiology, Edinburgh University, Edinburgh, UK