1. Institute of Virology and Microbiology, Faculty of Health, Centre for Biomedical Education and Research (ZBAF), Witten/Herdecke University, Germany
2. Clinic for General, Visceral and Transplant Surgery, University Hospital Muenster, Germany
3. Department of Vascular Medicine, University Heart Center, University Medical Center Hamburg-Eppendorf (UKE), Germany
4. Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Germany