1. Clinic for Physical Medicine and Rehabilitation, Clinical Centre of Serbia, Belgrade - Serbia
2. School of Medicine, University of Belgrade, Belgrade - Serbia
3. Institute of Epidemiology, School of Medicine, University of Belgrade, Belgrade - Serbia
4. Institute of Medical Statistics and Medical Informatics, School of Medicine, University of Belgrade, Belgrade - Serbia
5. Clinic for Orthopaedic Surgery and Traumatology, Clinical Centre of Serbia, Belgrade - Serbia