1. Children’s Mercy Hospitals and Clinics, University of Missouri, Kansas City School of Medicine, Kansas City, Missouri
2. Oakland’s Children’s Hospital, Oakland, California
3. Kaiser Foundation Hospital, Los Angeles, California
4. Baylor University Medical Center, Dallas, Texas
5. The Brooklyn Hospital Center, Brooklyn, New York
6. University of California, San Diego Medical Center, San Diego, California
7. Children’s Hospital, Boston, Harvard Medical School, Boston, Massachusetts