1. Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald – Insel Riems, Germany
2. Berlin-Brandenburg State Laboratory, Frankfurt (Oder), Germany
3. Institute of Infectology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald – Insel Riems, Germany
4. Tierpark Cottbus, Cottbus, Germany
5. Berlin Zoological Garden, Berlin, Germany
6. Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald – Insel Riems, Germany