1. Wake Forest University School of Medicine, Winston-Salem, North Carolina.
2. University of Puerto Rico.
3. Boston University, Boston, Massachusetts.
4. Harvard Medical School, Boston, Massachusetts.
5. University of Illinois.
6. Magee-Women's Hospital.
7. MCP Hahnemann, Philadelphia, Pennsylvania.
8. Ohio State University, Columbus, Ohio.
9. University of Maryland, Baltimore, Maryland.
10. University of California, San Francisco, California.
11. University of Indiana, Indianapolis, Indiana.