1. Washington University and St. Louis Children’s Hospital, St. Louis, MO
2. Mayo Clinic College of Medicine, Rochester, MN
3. University of Kentucky Medical Center, Lexington, KY
4. Medical College and Children’s Hospital of Wisconsin, Milwaukee, WI
5. Centers for Disease Control and Prevention, Atlanta, GA
6. University of Missouri, Kansas City, and Children’s Mercy Hospital, Kansas City, MO
7. University of Pennsylvania and Children’s Hospital of Philadelphia, PA