1. Department of Virology, Parasitology and Immunology Research Group of Comparative Physiology Faculty of Veterinary Medicine Ghent University Merelbeke Belgium
2. Wolvega Equine Hospital Oldeholtpade The Netherlands
3. Clinical Center of Veterinary Medicine‐ Equine Medicine and Reproduction Ludwig‐Maximilians‐Universitat Munchen: Munchen Bayern Germany