1. Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic, Rochester, Minnesota, USA
2. Division of General and Gastrointestinal Surgery, Oregon Health & Science University, Portland, Oregon, USA
3. Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
4. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
5. Division of Gastroenterology, Hepatology, and Nutrition, University of Louisville, Louisville, Kentucky, USA