1. School of Medicine, Belgrade + Institute of Orthopedic Surgery "Banjica", Belgrade
2. Institute of Orthopedic Surgery "Banjica", Belgrade, Serbia
3. School of Medicine, Belgrade + Clinics of Physical Medicine and Rehabilitation, Clinical Center of Serbia, Belgrade
4. Medical Academy "US Medical School", European University, Belgrade + Serbia Medical Center "Dr Dragiša Mišović", Belgrade
5. School of Organizational Sciences, Belgrade