1. Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark
2. CFIM/Department of Biomedical Sciences, University of Copenhagen, Blegdmasvej 3, DK-2200 Copenhagen N., Denmark
3. Department of Clinical Microbiology, H:S Rigshospitalet, Juliane Maries Vej 22, DK-2100 Copenhagen Ø., Denmark
4. Center for Biofilm Engineering, Montana State University, 366 Barnard Hall, P.O. Box 173980, Bozeman, MT 59717-3980, USA