1. RAND Corporation, Arlington, Virginia
2. Now with RAND Corporation, Santa Monica, California
3. Center for Health Policy, Columbia University School of Nursing, New York, New York
4. Now with Washington University School of Medicine, St Louis, Missouri
5. Columbia University School of Nursing, New York, New York
6. Columbia University Mailman School of Public Health, New York, New York
7. Department of Medicine, Columbia University Irving Medical Center, New York, New York
8. RAND Corporation, Pittsburgh, Pennsylvania
9. RAND Corporation, Boston, Massachusetts