1. Medical Microbiology Unit, University of Louvain, Avenue Hippocrate 54, B-1200 Brussels, Belgium
2. Department of Clinical Chemistry, Microbiology and Immunology, Blok A, Ghent University Hospital, De Pintelaan 185, B-9000 Ghent, Belgium
3. Laboratorium voor Microbiologie, Fac. Wetenschappen, Vakgroep WE10V, Ledeganckstraat 35, B-9000 Ghent, Belgium
4. Culture Collection of the University of Göteborg, Department of Clinical Bacteriology, Guldhedsgatan 10, 6tr, S-413 46 Göteborg, Sweden