1. Department of Anatomy, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
2. Department of Anatomy and Histology with Embriology, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
3. Department of Surgery, orthopedics and ophthalmology, Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
4. Department of Gastroenterohepatology, Clinical Hospital Center Zemun, Faculty of Medicine, University of Belgrade, Belgrade, Serbia