1. Institute for Medical Statistics and Informatics, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
2. Clinic for Orthopedic Surgery and Traumatology, University Clinical Center of Serbia, 11000 Belgrade, Serbia
3. Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
4. Institute of Social Medicine, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
5. Institute for Orthopedic Surgery “Banjica”, 11000 Belgrade, Serbia
6. Medical School, College of Vocational Studies, 11000 Belgrade, Serbia
7. Department of Anesthesiology, University Clinical Center of Serbia, 11000 Belgrade, Serbia
8. Department for Primary Health Care and Public Health, Faculty of Medicine Foca, University of East Sarajevo, 71123 East Sarajevo, Bosnia and Herzegovina
9. Department for Neurology and Psychiatry, Faculty of Medicine Foca, University of East Sarajevo, 71123 East Sarajevo, Bosnia and Herzegovina
10. Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN 55902, USA