1. Walter Zelman is the president and chief executive officer of the California Association of Health Plans, in Sacramento. He was special assistant to the administrator, Agency for Health Care Policy and Research, Department of Health and Human Services (1994–1995) and senior health policy adviser to the Clinton administration (1993–1994). Larry Brown is a professor in the Division of Health Policy and Management at Columbia University's Joseph L. Mailman School of Public Health in New York City.