1. Institute of Medical Microbiology, University of Zürich, Zürich, Switzerland
2. Institute for Medical Microbiology and Hygiene, University Hospital Tübingen, Tübingen, Germany
3. Institute of Molecular Biology, Center of Excellence for Molecular Medicine, Slovak Academy of Sciences, Bratislava, Slovak Republic
4. Institute of Medical Microbiology and Hygiene, University of Saarland, Homburg, Germany