| Affiliation: | 1. The Heart Institute, Cincinnati Children's Hospital Medical Center, , Cincinnati, Ohio, USA;2. The James M. Anderson Center for Clinical Excellence, Cincinnati Children's Hospital Medical Center, , Cincinnati, Ohio, USA;3. Children's Hospital & Medical Center, , Omaha, Neb, USA;4. University of Maryland School of Medicine, , Baltimore, Md, USA;5. Boston Children's Hospital Medical Center, , Boston, Mass, USA;6. Mattel Children's Hospital at UCLA, , Los Angeles, Calif, USA;7. Children's National Medical Center, , Washington, DC, USA;8. University of Texas Health Center, , San Antonio, Tex, USA;9. Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, , Cincinnati, Ohio, USA |
