Division of Gastroenterology and Hepatology, University Hospital Essen, Germany; Department of Internal Medicine, Hacettepe University, School of Medicine, Ankara
2.Division of Gastroenterology and Hepatology, University Hospital Essen, Germany
3.Çukurova Üniversitesi Tıp Fakültesi Gastroenteroloji Bilim Dalı, Adana
4.Department of Biochemistry, Çukurova University, School of Medicine, Adana