Ersin Gürkan Dumlu, Mesut Özdedeoglu, Birkan Bozkurt, Mehmet Tokaç, Samet Yalçin2, Mehmet Kiliç2
From the Department of General Surgery1, Ataturk Research and Training Hospital, Ankara 06800, Turkey; Department of General Surgery2, Yildirim Beyazit University, Ankara 06800, Turkey.