1. Institute for Orthopedic Surgery and Traumatology “Banjica”, Mihajla Avramovica 28, 11000 Belgrade, Serbia
2. Medical School, University of Belgrade, Serbia
3. Department of Mathematics and Informatics, Faculty of Sciences, University of Novi Sad, Trg D. Obradovica 4, 21000 Novi Sad, Serbia
4. Department of Mechanics, Faculty of Technical Sciences, University of Novi Sad, Trg D. Obradovica 6, 21000 Novi Sad, Serbia