1. University of North Carolina, Chapel Hill, Chapel Hill, North Carolina.
2. The George Washington University School of Public Health and Health Services, Washington, District of Columbia.
3. Los Angeles County Department of Public Health, Los Angeles, California.
4. Childrens Hospital, Montefiore, Bronx, New York.
5. Wayne State University, Horizons Project, Detroit, Michigan.
6. Baylor College of Medicine, Thomas Street Health Center, and the Michael E. DeBakey VA Medical Center, Houston, Texas.