1. Department of Human Resources, Mayo Clinic, Rochester, Minnesota, USA.
2. Division of General Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA.
3. Department of Internal Medicine, Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota, USA.
4. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA.
5. Internal Medicine Administrative Services, and Mayo Clinic, Rochester, Minnesota, USA.
6. Division of Clinical Trials and Biostatistics, Mayo Clinic, Rochester, Minnesota, USA.