1. Division of Gastroenterology and Transplant Institute; Loma Linda University; Loma Linda CA
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine; University of Michigan Hospital System; Ann Arbor MI
3. Department of Medicine; Mount Sinai School of Medicine; New York NY
4. Duke University Hospital; Durham NC
5. Houston VA Health Services Research Center of Excellence; Houston TX
6. Health Services Research and Gastroenterology; Michael E. DeBakey Veterans Affairs Medical Center; Houston TX
7. Department of Medicine; Baylor College of Medicine; Houston TX