1. Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, United States
2. Department of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, United States
3. Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, United States
4. Department of Anatomic Pathology, Mayo Clinic, Rochester, Minnesota, United States
5. Department of Gastroenterologic and General Surgery, Mayo Clinic, Rochester, Minnesota, United States