1 Center for Clinical Management Research, Department of Veterans Affairs, VA Ann Arbor Healthcare System, Ann Arbor, Michigan; Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, Michigan; Institute for Healthcare Policy and Innovation, Ann Arbor, Michigan.
2 Center for Clinical Management Research, Department of Veterans Affairs, VA Ann Arbor Healthcare System, Ann Arbor, Michigan; Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, Michigan; Institute for Healthcare Policy and Innovation, Ann Arbor, Michigan. Electronic address: [email protected].