[1] Univ Belgrade, Clin Phys Med & Rehabil, Clin Ctr Serbia, Fac Med, Belgrade 11000, Serbia
[2] Univ Belgrade, Inst Epidemiol, Sch Med, Fac Med, Belgrade 11000, Serbia
[3] Univ Belgrade, Inst Med Stat & Med Informat, Fac Med, Belgrade 11000, Serbia
[4] Clin Ctr Serbia, Clin Phys Med & Rehabil, Belgrade 11000, Serbia
[5] Univ Belgrade, Clin Orthopaed Surg & Traumatol, Clin Ctr Serbia, Fac Med, Belgrade 11000, Serbia