1. Department of Anesthesiology, Institute of Oncology, Istanbul University, Istanbul, Turkey
2. Department of Anesthesiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
3. Department of Surgery, Institute of Oncology, Istanbul University, Istanbul, Turkey
4. Department of Surgery, Acibadem International Hospital, Istanbul, Turkey
5. Department of Surgery, Okmeydanı Education and Research Hospital, Istanbul, Turkey