| Affiliation: | 1. Department of Internal Medicine, Division of Gastroenterology, CGH Medical Center, , Sterling, Illinois, USA;2. Section of Gastroenterology and Hepatology, Georgia Regents University, , Augusta, Georgia, USA;3. Department of Internal Medicine, Division of Gastroenterology, Saint Francis Hospital, , Evanston, Illinois, USA;4. Department of Internal Medicine, Division of Gastroenterology, University of Tishreen, , Latakia, Syria;5. Department of Mathematics and Computer Science, Georgia Regents University, , Augusta, Georgia, USA |
