1. Pritzker School of Medicine, University of Chicago, Comer Children’s and La Rabida Children’s Hospitals, Chicago, Illinois
2. Golisano Children’s Hospital at Strong, University of Rochester, Rochester, New York
3. University of Texas Health Science Center, Coordinating Center for Clinical Trials, Houston, Texas
4. University of Arizona, Tucson, Arizona
5. Children’s Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania
6. University of Minnesota, Minneapolis, Minnesota
7. Providence, Rhode Island