[1] Mother & Child Hlth Inst Serbia, Dept Pediat Immunol, YU-11070 Belgrade, Serbia Monteneg, Serbia
[2] Mother & Child Hlth Inst Serbia, Dept Pediat Surg, YU-11070 Belgrade, Serbia Monteneg, Serbia
[3] Mother & Child Hlth Inst Serbia, Dept Microbiol, YU-11070 Belgrade, Serbia Monteneg, Serbia
[4] Mother & Child Hlth Inst Serbia, Dept Pathol, YU-11070 Belgrade, Serbia Monteneg, Serbia