1. 1Department and Clinic of Surgery and Ophthalmology, Faculty of Veterinary Science, Szent István University, H-1400 Budapest, P.O. Box 2, Hungary
2. 2Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
3. 3Orthopaedics and Trauma Department, Uzsoki Hospital, Budapest, Hungary
4. 4Department of Internal Medicine, Faculty of Veterinary Science, Szent István University, Budapest, Hungary