1. Department of Pediatrics, Division of Gastroenterology, Gazi University, Faculty of Medicine, Ankara, Turkey
2. Infectious Diseases Pathology Branch, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Department of Pathology, Gazi University, Faculty of Medicine, Ankara, Turkey
4. Department of Pathology, Yale University School of Medicine, New Haven, Connecticut
5. Department of of Internal Medicine, Section of Digestive Diseases, Yale Liver Center, Yale University School of Medicine, New Haven, Connecticut