1. Center for Chronic Disease Outcomes Research, Minneapolis Department of Veterans Affairs (VA) Health Care System, Minneapolis, MN
2. Center for Health Information and Communication, VA Health Services Research and Development, Richard L. Roudebush VA Medical Center, Indianapolis, IN; Indiana University School of Medicine, Indianapolis, IN; and Regenstrief Institute Inc, Indianapolis, IN
3. VA Connecticut Healthcare System, West Haven, CT; and Yale School of Medicine, New Haven, CT
4. VA Health Services Research and Development Service, Center for the Study of Healthcare Innovation, Implementation and Policy, VA Greater Los Angeles Healthcare System, Sepulveda, CA