doi:10.1038/ajg.2009.394
1Department of General Surgery, Ankara Education and Research Hospital, Ankara, Turkey; 2Department of Gastroenterology, Ankara Education and Research Hospital, Ankara, Turkey. Correspondence: Gökhan Karaca, MD, Department of General Surgery, Ankara Education and Research Hospital, Serpil sokak, 7/4, Seyranbağlari, Çankaya, Ankara 6310, Turkey. E-mail: gokhankaracaa@yahoo.com