| Institution: | 1. Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, USA;2. Center for Gastrointestinal Biology and Disease, Division of Gastroenterology and Hepatology, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, USA;3. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark;4. Institute of Pathology, Aalborg Hospital, Aalborg, Denmark |
