1. Department of Pathology, Istanbul University-Cerrahpaşa Carrahpaşa Faculty of Medicine, Istanbul, Turkey
2. Department of Pathology, Prof. Dr. C. Taşçıoğlu Ş. Hospital, Istanbul, Turkey
3. Department of Pediatric Surgery, Istanbul University-Cerrahpaşa Carrahpaşa Faculty of Medicine, Istanbul, Turkey
4. Department of Pediatric Hematology and Oncology, Istanbul University-Cerrahpaşa Carrahpaşa Faculty of Medicine, Istanbul, Turkey