1. İstanbul University-Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Department of Gastroenterology, İstanbul, Turkey

2. University of Health Sciences Turkey, Bakırköy Dr. Sadi Konuk Training and Research Hospital, Clinic of Oncology, İstanbul, Turkey

3. University of Health Sciences Turkey, Başakşehir Çam and Sakura City Hospital, Clinic of Gastroenterology, İstanbul, Turkey

4. Mardin State Hospital, Clinic of Gastroenterology, Mardin, Turkey

5. İstanbul University-Cerrahpaşa, Cerrahpaşa Faculty of Medicine, Department of Pathology, İstanbul, Turkey