1. Department of Gastroenterology and Hepatology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
2. Chang Gung University College of Medicine, Taoyuan, Taiwan
3. Department of Gastroenterology and Hepatology, Tu Cheng Hospital, New Taipei City, Taiwan
4. Department of Biotechnology, Ming Chuan University, Taoyuan, Taiwan
5. Department of Internal Medicine, Division of Infectious Diseases, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA
6. Department of Internal Medicine, Division of Gastroenterology, Michigan Medicine, University of Michigan, Ann Arbor, Michigan, USA