[1
]
Center for Chronic Disease Outcomes Research, Minneapolis Veterans Affairs Health
Care System, Minneapolis, Minnesota.
[2
]
Department of Medicine, University of Minnesota Medical School, Minneapolis.
[3
]
Division of Epidemiology, University of Minnesota School of Public Health, Minneapolis,
Minneapolis, Minnesota.
[4
]
Center for Health Information and Communication, Roudebush Veterans Affairs Medical
Center, Indianapolis, Indiana.
[5
]
Department of Medicine, Indiana University School of Medicine, Indianapolis.
[6
]
Regenstrief Institute, Indianapolis, Indiana.