1. Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
2. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Greifswald-Insel Riems, Germany
3. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Novel and Emerging Infectious Diseases, Greifswald-Insel Riems, Germany
4. Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Diagnostic Virology, Greifswald-Insel Riems, Germany
5. Animal Park, Schleswig-Holstein, Germany
6. Cotswold Wildlife Park and Gardens, Burford, Oxfordshire, UK
7. Institute for Virology, Universität des Saarlandes, Homburg/Saar, Germany
8. Division of Neuroimmunology, Institute of Clinical Chemistry, Universitätsklinikum Schleswig-Holstein, Kiel, Germany
9. Department of Clinical Neuroimmunology and Neurochemistry, and Department of Neurology, Medizinische Hochschule Hannover, Hannover, Germany