1. Institute of Virology, Hannover Medical School, 30625 Hannover, Germany
2. Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Str. 74, 20359 Hamburg, Germany
3. Qiagen Hamburg GmbH, Königstr. 4a, 22767 Hamburg, Germany
4. Blood Systems Research Institute and Department of Laboratory Medicine, University of California, San Francisco, California
5. Department of Medical Microbiology and Virology, University of Kiel, 24105 Kiel, Germany
6. Department of Virology, University of Freiburg, 79008 Freiburg, Germany
7. Department of Medicinal Chemistry, University of Erlangen-Nürnberg, Schuhstrasse 19, 91052 Erlangen, Germany
8. Institute of Virology, University of Bonn Medical Centre, Sigmund-Freud-St. 25, 53127 Bonn, Germany