1 Center for Clinical Management Research, LTC Charles S. Kettles Veterans Affairs Medical Center, Ann Arbor, Michigan; Barrett's Esophagus Program, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, Michigan; Cancer Control and Population Sciences Program, Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, Michigan. Electronic address: jhr@umich.edu.
2 Helen Diller Family Comprehensive Cancer Center, Department of Pathology, University of California San Francisco, San Francisco, California.