1. Selcuk University, Faculty of Medicine, Departments of Internal Medicine, Division of Gastroenterohepatology, Selcuklu, Konya, Turkey
2. Selcuk University, Faculty of Medicine, Department of Otorhinolaryngology, Selcuklu, Konya, Turkey
3. Eskisehir Osmangazi University, Faculty of Medicine, Department of Internal Medicine, Division of Gastroenterology, Eskisehir/Turkey