1. VA HSR&D Center for Health Information and Communication, Roudebush VA Medical Center, Indianapolis, Indiana2Department of Medicine, Indiana University School of Medicine, Indianapolis3Regenstrief Institute, Indianapolis, Indiana
2. VA HSR&D Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota5University of Minnesota Medical School, Minneapolis
3. Department of Biostatistics, Indiana University School of Medicine, Indianapolis
4. Department of Health Policy and Management, College of Public Health, University of Georgia, Athens