1. Ambulatory Care Access Project, United Hospital Fund of New York
2. At the time of this study Lisa Zeitel was a senior analyst at the United Hospital Fund; she is now manager of the Managed Care Service Group, Met Life
3. Bureau of Health Care Delivery and Assistance, U.S. Public Health Service
4. Division of General Medicine, University of North Carolina at Chapel Hill
5. Department of Research, Analysis, and Planning at the United Hospital Fund