1. From the Children's Hospital and University of California, San Diego, California; the
2. Baylor College of Medicine and Texas Children's Hospital, Houston, Texas; the
3. Children's Memorial Hospital, Chicago, Illinois; the
4. Columbus Children's Hospital, Columbus, Ohio; the
5. Children's Hospital, Los Angeles, California; the
6. University of Arkansas for Medical Sciences and Arkansas Children's Hospital, Little Rock, Arkansas; the
7. Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania; and the
8. Brenner Children's Hospital, Winston-Salem, North Carolina.