1. Department of General Surgery, Lutfiye Nuri Burat State Hospital, Istanbul, Turkey.
2. Department of Anesthesiology and Reanimation, Lutfiye Nuri Burat Goverment Hospital, Istanbul, Turkey.
3. Department of Anesthesiology and Reanimation, Haseki Training and Research Hospital, Istanbul, Turkey.
4. Department of General Surgery, Haseki Training and Research Hospital, Istanbul, Turkey.
5. Department of General Surgery, Cerrahpasa Medicine Faculty, Istanbul University, Istanbul, Turkey.
6. Department of General Surgery, Haydapasa Numune Training and Research Hospital, Istanbul, Turkey.