1. Department of Internal Medicine, Baglar Hospital, Diyarbakir, Turkey
2. Department of Gastroenterology, Medical School of Ankara University, Ankara, Turkey
3. Department of Gastroenterology, Medical School of Dicle University, Diyarbakir, Turkey
4. Department of Internal Medicine, Damla Hospital, Elazig, Turkey
5. Department of Gastroenterology, Medical School of Ufuk University, Ankara, Turkey