1. VA Ann Arbor Center for Clinical Management Research, Ann Arbor, Michigan;
2. Department of Psychological Sciences, University of Missouri, Columbia, Missouri; and
3. Departments ofHealth Behavior and Health Education,
4. Center for Bioethics and Social Sciences in Medicine,
5. Internal Medicine,
6. Psychology, and
7. Child Health Evaluation and Research Unit, Department of Pediatrics, University of Michigan, Ann Arbor, Michigan