Department of Gastroenterology, Katip Çelebi University, İzmir Atatürk Training and Research Hospital, İzmir, Turkey
2.Department of, Gastroenterology, Atatürk Training and Research Hospital, İzmir
3.Department of Gastroenterology, İzmir Atatürk Training and Research Hospital, İzmir
4.Department of Gastroenterology, Katip Çelebi University Atatürk Training and Research Hospital, İzmir, Turkey
5.Department of Gastroenterology, Atatürk Research and Education Hospital, İzmir
6.Departments of General Surgery and Gastroenterology, Memorial Antalya Hospital, Antalya