1. Veterans Affairs Center for Clinical Management Research, Ann Arbor, Michigan2Department of Surgery, University of Michigan Health System, Ann Arbor3Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor
2. Veterans Affairs Center for Clinical Management Research, Ann Arbor, Michigan3Institute for Healthcare Policy and Innovation, University of Michigan, Ann Arbor4Department of Internal Medicine, University of Michigan Health System, Ann Arbor
3. Department of Population Health Sciences, University of Utah School of Medicine, Salt Lake City6Veterans Affairs Salt Lake City Center for Informatics Decision Enhancement and Surveillance (IDEAS), Salt Lake City, Utah
4. Department of Internal Medicine, University of Michigan Health System, Ann Arbor7Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor
5. Veterans Affairs Center for Clinical Management Research, Ann Arbor, Michigan4Department of Internal Medicine, University of Michigan Health System, Ann Arbor