1. Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Hanzeplein
1, P.O. Box 30001, 9700 RB Groningen, The Netherlands
2. Institut
für Mikrobiologie, Ernst-Moritz-Arndt Universität Greifswald, Friedrich-Ludwig-Jahn-Str. 15, D-17489 Greifswald, Germany
3. Cobra Biologics, The Science Park, Keele, Staffordshire ST5 5SP, United Kingdom
4. Centre
for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Richardson Road, Newcastle upon Tyne NE2 4AX, United Kingdom