1. Equine Clinic, Faculty of Veterinary Medicine, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
2. Institute for Biometrics and Data Processing, Faculty of Veterinary Medicine, Freie Universität Berlin, Oertzenweg 19b, 14163 Berlin, Germany.
3. Department for Large Animal Diseases, Faculty of Veterinary Medicine, Warsaw University of Life Sciences, Nowoursynowska 100, 02-786 Warsaw, Poland.