1. Virology and Microbiology, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, 58453 Witten, Germany
2. Bavarian Health and Food Safety Authority, 85764 Oberschleißheim, Germany
3. Biochemistry and Molecular Medicine, Center for Biomedical Education and Research (ZBAF), Witten/Herdecke University, 58453 Witten, Germany
4. Institute for Transplant Diagnostics and Cell Therapeutics, Heinrich-Heine-University, 40204 Duesseldorf, Germany
5. Institute of Pathology, Heinrich Heine University and University Hospital, 40204 Duesseldorf, Germany
6. Department of Radiation Oncology, Heinrich-Heine-University, 40204 Duesseldorf, Germany