1. Veterans Affairs Health Services Research and Development Center for Care Delivery and Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota
2. Department of Medicine, University of Minnesota, Minneapolis
3. Department of Psychology, University of Minnesota, Minneapolis
4. Division of Biostatistics, University of Minnesota, Minneapolis
5. Biostatistics Core, Masonic Cancer Center, University of Minnesota, Minneapolis
6. Survey Research Center, Institute for Social Research, University of Michigan, Ann Arbor
7. Institute for Health Informatics, University of Minnesota, Minneapolis