1. 1Department of Equine, Small Animal, Poultry and Wild Animal Diseases, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
2. 2Department of Pathophysiology, Faculty of Veterinary Medicine, University of Belgrade, Bulevar oslobođenja 18, 11000 Belgrade, Serbia
3. 3Department of Economics and Statistics, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
4. 5Department of Surgery, Orthopaedics and Ophthalmology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
5. 4Department of Pathology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
6. 6Department of Biology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia