1. Department of Gastroenterology and Hepatology Zhongshan Hospital, Fudan University Shanghai China
2. Division of Gastroenterology, Department of Internal Medicine University of South Carolina School of Medicine Columbia South Carolina USA
3. Catalyst Medical Consulting Simpsonville South Carolina USA
4. AMITA Health Saint Joseph Hospital Chicago Chicago Illinois USA
5. Mercy Internal Medicine Service Trinity Health of New England Springfield Massachusetts USA
6. Department of Medicine New York University Grossman School of Medicine New York New York USA
7. Division of Gastroenterology, Department of Medicine Loma Linda University Loma Linda California USA