Affiliation: | 1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Mayo Clinic, 13400 E. Shea Boulevard, Scottsdale, AZ 85259, USA;2. Inflammatory Bowel Disease Clinic, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Mayo Clinic, 13400 E. Shea Boulevard, Scottsdale, AZ 85259, USA |