1. Divisions of General Pediatrics and
2. General Internal Medicine,
3. Division of General Medicine and
4. Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, Michigan; and
5. Philip R. Lee Institute for Health Policy Studies, and
6. Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California;
7. Child Health Evaluation and Research Unit, Division of General Pediatrics, University of Michigan Health System, Ann Arbor, Michigan;
8. Gerald R. Ford School of Public Policy and
9. Department of Health Behavior and Health Education, School of Public Health, University of Michigan, Ann Arbor, Michigan