1. Department of Internal Medicine, Honaz State Hospital
2. Department of Internal Medicine, Division of Gastroenterology, Bahçeşehir University, Faculty of Medicine
3. University of Health Sciences, Institution of Hamidiye Health Sciences, Department of Molecular Biology and Genetics
4. Department of Internal Medicine, University of Health Sciences, Bakırköy Dr. Sadi Konuk Hospital
5. Department of Internal Medicine, University of Health Sciences, Sultan Abdülhamid Han Hospital
6. Department of Pathology, University of Health Sciences, Sultan Abdülhamid Han Hospital, Istanbul, Turkey.