1. Division of Gastroenterology; Department of Internal Medicine; University of Michigan Medical School; Ann Arbor Michigan
2. Department of Computational Medicine and Bioinformatics; University of Michigan Medical School; Ann Arbor Michigan
3. Statistics Online Computational Resource (SOCR); University of Michigan School of Nursing; Ann Arbor Michigan
4. Michigan Institute for Data Science (MIDAS); University of Michigan; Ann Arbor Michigan
5. Department of Digestive Diseases; Beijing Friendship Hospital; Capital Medical University; Beijing China
6. National Center for Clinical Medical Research of Digestive Diseases; Beijing China