1. Division of Gastroenterology, Department of Medicine Duke University Health System Durham NC
2. Division of Cardiology, Department of Medicine Duke University Health System Durham NC
3. Department of Biostatistics and Bioinformatics Duke University Durham NC
4. Division of Gastroenterology Mercy Hospital St. Louis MO
5. Department of Pathology Duke University Hospital Durham NC
6. Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic Rochester MN
7. Department of Medicine, Durham Veterans Affairs Medical Center Durham NC