Hacettepe Tıp Fakültesi İç Hastalıkları anabilim Dalı, Gastroenteroloji Ünitesi, Ankara
2.Hacettepe University Medical School Departments of Internal Medicine Ankara, Turkey
3.The Deparment of Gastroenterology, General Surgery and Pathology, Hacettepe Univerisity School of Medicine, Ankara
4.Hacettepe University Medical School Departments of Internal Medicine Chest Diseases Ankara, Turkey