1. Department of Health Technology, Technical University of Denmark , Kongens Lyngby , Denmark
2. Department of Veterinary and Animal Sciences, University of Copenhagen , Frederiksberg , Denmark
3. Costerton Biofilm Centre, Institute of Immunology and Microbiology, University of Copenhagen , Copenhagen , Denmark
4. Department of Clinical Microbiology, University of Copenhagen , Copenhagen , Denmark
5. Department of Orthopedic Surgery, Herlev Hospital , Herlev , Denmark