1. Department of Internal Medicine; Cook County Health and Hospitals System; Chicago Illinois USA
2. Department of Internal Medicine, Forest Hills Hospital; Cook County Health and Hospitals System; Chicago Illinois USA
3. Division of Gastroenterology and Hepatology; Cook County Health and Hospitals System; Chicago Illinois USA
4. Division of Gastroenterology, Hepatology and Nutrition; University of Texas Health Science Center-Houston; Houston Texas USA
5. Department of Radiology; Cook County Health and Hospitals System; Chicago Illinois USA