1. Center for Outcomes Research and Evaluation, Maine Medical Center Research Institute, Portland, ME, USA
2. Department of Health Behavior and Health Education, University of Michigan School of Public Health, Ann Arbor, MI, USA
3. Division of General Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA, USA
4. Department of Population Health Sciences, University of Utah and Salt Lake City VA Center for Informatics Decision Enhancement and Surveillance, Salt Lake City, UT, USA