Affiliation: | 1. Esophageal Motility Program, Division of Gastroenterology, University of Michigan, Ann Arbor, Michigan;3. Interventional Endoscopy Program, Division of Gastroenterology, University of Michigan, Ann Arbor, Michigan;4. Department of Pathology, University of Michigan, Ann Arbor, Michigan;6. Section of Thoracic Surgery, University of Michigan, Ann Arbor, Michigan |