Türkiye Yüksek İhtisas Hastanesi Gastroenteroloji ve Gastroenteroloji Cerrahisi klinikleri, Ankara
2.Güven Hospital, General Surgery Division, and Department of Pathology, Gazi University, School of Medicine, Ankara
3.Department of Gastrointestinal Surgery, Türkiye Yuksek Ihtisas Training and Research Hospital, Ankara
4.Departments of Pathology, Türkiye Yüksek İhtisas Hospital, Ankara
5.Hacettepe University Medical School, Department of Biochemistry, Ankara
6.Malatya ve Türkiye Yüksek İhtisas Hastanesi Gastroenteroloji Cerrahisi Kliniği