1. Department of Gastroenterology; University of Ankara Medical School; Ankara Turkey
2. Department of Gastroenterology, Hepatology and Endocrinology; Hannover Medical School; Hannover Germany
3. Department of Pathology; University of Ankara Medical School; Ankara Turkey
4. Department of Internal Medicine (Academic Liver Unit and Research Laboratory of Internal Medicine); Medical School; University of Thessaly; Larissa Greece
5. Department of Infectious Diseases; Cerrahpasa Medical School; University of Istanbul; Istanbul Turkey
6. Department of Gastroenterology, Hepatology and Infectious Diseases; Heinrich Heine University; Dusseldorf Gemany
7. Department of Gastroenterology; Medical Faculty; Dicle University; Diyarbakir Turkey
8. Institute of Pathology; University of Cologne; Cologne Germany