1. University of Minnesota; Family Medicine and Community Health; Minneapolis; MN; USA
2. Duke University Medical Center; Division of Medical Oncology, Department of Medicine; Durham; NC; USA
3. University of Minnesota; Division of Epidemiology and Community Health; Minneapolis; MN; USA
4. Veterans Affairs Medical Center; Center for Chronic Disease Outcomes Research; Minneapolis; MN; USA
5. Veterans Affairs Medical Center; Center for Health Services Research in Primary Care; Durham; NC; USA