1. a Department of Chemical Technology, Institute of Biomedical Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
2. b Department of Chemical Technology, Institute of Biomedical Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
3. c Department of Medical Microbiology, AMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
4. d Department of Medical Microbiology, AMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
5. e Department of Medical Microbiology, AMC, University of Amsterdam, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands
6. f Department of Chemical Technology, Institute of Biomedical Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands