1. General Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
2. Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
3. Division of Endocrinology, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Gastroenterology, Hepatology and Nutrition, University of Louisville School of Medicine, Louisville, Kentucky
5. Division of Engineering, Mayo Clinic, Rochester, Minnesota, USA