1. Southern Illinois University School of Medicine, Springfield, Illinois.
2. University of Illinois, Chicago, Illinois.
3. State University of New York, Downstate Medical Center, Brooklyn, New York.
4. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.
5. University of Southern California, Los Angeles, California.
6. Maimonides Medical Center, Brooklyn, New York.
7. The CORE Center at John H. Stroger Jr. Hospital of Cook County, Chicago, Illinois.
8. National Institute of Child Health and Human Development, Bethesda, Maryland.