1. Present address: Unité de Virologie Structurale, Institut Pasteur, France.
2. Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
3. Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
4. Institute of Epidemiology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
5. Institute for Medical Biochemistry and Molecular Biology, Ernst Moritz Arndt University, Greifswald, Germany
6. Istituto Zooprofilattico Sperimentale della Lombardia e dell’Emilia Romagna, Brescia, Italy
7. Institute for Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany