Ankara Numune Teaching and Research Hospital, Department of 2nd Surgery, Ankara
2.Ankara Numune Hastanesi 1. Cerrahi Kliniği, Ankara
3.Departments of General Surgery and Pathology, Atatürk Teaching and Research Hospital, Ankara
4.Department of General Surgery, Ministry of Health, Ankara Education and Research Hospital, Ankara Departments of
5.Department of Gastroenterology, Türkiye Yüksek İhtisas Hospital, Ankar