1. Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
2. The Heart Center, Nationwide Children's Hospital, Columbus, OH
3. Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
4. The Heart and Vascular Center at the Christ Hospital, Cincinnati, OH
5. The Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
6. Herma Heart Center, Children's Hospital of Wisconsin, Milwaukee, WI