1 Department of General Surgery, Acibadem Mehmet Ali Aydinlar University School of Medicine, Acibadem Maslak Hospital, Buyukdere Caddesi No:40, 34457, Sariyer, Istanbul, Turkey.
2 Department of General Surgery, Acibadem Mehmet Ali Aydinlar University School of Medicine, Acibadem Maslak Hospital, Buyukdere Caddesi No:40, 34457, Sariyer, Istanbul, Turkey. tkarahasanoglu@yahoo.com.