[1] Baskent Univ, Sch Med, Div Pediat Neurol, TR-06490 Ankara, Turkey
[2] Dr Sami Ulus Women & Childrens Hlth & Dis Trainin, Dept Pediat, Ankara, Turkey
[3] Baskent Univ, Fac Med, Hematol Lab, TR-06490 Ankara, Turkey
[4] Baskent Univ, Fac Med, Dept Biostat, TR-06490 Ankara, Turkey