1. Clinical Unit of Equine Internal Medicine, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
2. Institute for Veterinary Disease Control Mödling, Austrian Agency for Health and Food Safety Ltd. (AGES), Robert Koch-Gasse 17, 2340 Mödling, Austria
3. Viral Zoonoses, Emerging and Vector-Borne Infections Group, Institute of Virology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
4. Section of Clinical & Comparative Neuropathology, Institute of Veterinary Pathology, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Feodor-Lynen Straße 23, 81377 Munich, Germany
5. Department of Basic Medical Sciences, College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai Healthcare City, Building 14, Dubai P.O. Box 505055, United Arab Emirates