Affiliation: | 1. Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL, USA;2. Centre for Respiratory and Allergy, University of Manchester, Manchester, UK;3. Department of Medical Statistics, University Hospital of South Manchester, Manchester, UK;4. Division of Gastroenterology and Hepatology, Mayo Clinic, Scottsdale, AZ, USA;5. Division of Pulmonology, Mayo Clinic, Jacksonville, FL, USA |