1. Division of Gastroenterology and Hepatology; University of North Carolina; Chapel Hill NC USA
2. Duke Clinical Research Institute & Department of Biostatistics; Duke University; Durham NC USA
3. Division of Gastroenterology; University of Michigan; Ann Arbor MI USA
4. Division of Gastroenterology and Hepatology; Indiana University School of Medicine; Indianapolis IN USA
5. Division of Gastroenterology; California Pacific Medical Center; San Francisco CA USA
6. Division of Gastroenterology and Hepatology; Mayo Clinic; Rochester MN USA
7. Division of Gastroenterology; University of Pennsylvania; Philadelphia PA USA
8. Division of Gastrointestinal and Liver Diseases; University of Southern California; Los Angeles CA USA
9. Liver Disease Research Branch; Division of Digestive Diseases and Nutrition; National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK); NIH; Bethesda MD USA
10. Division of Gastroenterology; University of Texas Southwestern; Dallas TX USA