1. Department of Anesthesiology, Institute of Oncology, Istanbul University, Istanbul, Turkey
2. Department of Radiation Oncology, Institute of Oncology, Istanbul University, Istanbul, Turkey
3. Department of Pediatric Hematology & Oncology, Institute of Oncology, Istanbul University, Istanbul, Turkey
4. Istanbul Medical Faculty, Department of Biostatistics, Istanbul University, Istanbul
5. Cerrahpasa Medical Faculty, Department of Anesthesiology, Istanbul University, Istanbul, Turkey