[1] Ankara Child Dis Hematol Oncol Training & Res Hos, Dept Pathol, TR-06110 Ankara, Turkey
[2] Ankara Child Dis Hematol Oncol Training & Res Hos, Dept Pediat Surg, TR-06110 Ankara, Turkey
[3] Ankara Child Dis Hematol Oncol Training & Res Hos, Dept Radiol, TR-06110 Ankara, Turkey
[4] Ankara Child Dis Hematol Oncol Training & Res Hos, Dept Oncol, TR-06110 Ankara, Turkey
[5] Johns Hopkins Univ Hosp, Dept Pathol, Baltimore, MD 21287 USA