1. Department of Gastroenterology, Canakkale State Hospital, Turkey
2. Department of Gastroenterology, Giresun State Hospital, Turkey
3. Department of Gastroenterology, GATA Haydarpasa Training Hospital, Turkey
4. Department of Gastroenterology, Ankara Training and Research Hospital, Turkey
5. Department of Gastroenterology, Dıskapı Yıldırım Beyazit Training and Research Hospital, Turkey