[1] Inst Children & Youth Hlth Care Vojvodina, Novi Sad, Serbia
[2] Univ Clin Ctr Vojvodina, Novi Sad, Serbia
[3] Special Hosp Rheumat Dis, Novi Sad, Serbia
[4] Univ Novi Sad, Fac Med, Novi Sad, Serbia
[5] Univ Novi Sad, Inst Children & Youth Hlth Care Vojvodina, Fac Med, Hajduk Veljkova 10, Novi Sad 21000, Serbia