1 Barrett's Esophagus Program, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, Michigan.
2 Barrett's Esophagus Program, Division of Gastroenterology, University of Michigan Medical School and Ann Arbor Veterans Affairs Healthcare System, Ann Arbor, Michigan.
3 Barrett's Esophagus Program, Division of Gastroenterology, University of Michigan Medical School and Ann Arbor Veterans Affairs Healthcare System and Veterans Affairs Center for Clinical Management Research, Ann Arbor, Michigan.