1. Population Studies Center, University of Michigan Institute for Social Research, Ann Arbor, Michigan
2. Department of Public Health Sciences, University of Texas, El Paso, Texas
3. YMCA of Greater Richmond, Richmond, Virginia
4. Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan
5. Office of the Assistant Secretary for Health, U.S. Department of Health and Human Services, Washington, District of Columbia
6. Departments of Health Management and Policy and Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan