1. Institute of Medical Microbiology and Hygiene, Institutes of Infectious Disease Medicine
2. Department of Veterinary and Biomedical Sciences, University of Nebraska, Lincoln, Nebraska
3. Institute of Medical Microbiology, University of Münster, Münster
4. Institute for Medical Microbiology and Immunology, University of Bonn, Bonn, Germany
5. Institute of Experimental and Clinical Pharmacology and Toxicology, University of Saarland, Homburg/Saar