1. Division of Gastroenterology and Hepatology; Stanford University Medical Center; Stanford CA USA
2. Hepatobiliary Division; Department of Internal Medicine and Hepatitis Center; Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
3. Division of Gastroenterology and Hepatology; Mayo Clinic; Rochester MN USA
4. Division of Gastroenterology; University of Michigan Health System; Ann Arbor MI USA
5. Stanford Prevention Research Center; Stanford Cancer Institute; Stanford CA USA