[1] Univ Novi Sad, Fac Med, Novi Sad, Serbia
[2] Inst Oncol Vojvodina, Sremska Kamenica, Serbia
[3] Inst Child & Youth Hlth Care, Pediat Surg Clin, Novi Sad, Serbia
[4] Univ Pristina, Fac Med, Kosovska Mitrovica, Serbia
[5] Inst Cardiovasc Dis Vojvodina, Sremska Kamenica, Serbia