The University of Kansas Medical Center, Kansas City, Kansas, United States
Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
Nationwide Children's Hospital, Columbus, Ohio, United States
Duke University, Durham, North Carolina, United States
University of Texas Southwestern Medical Center, Dallas, Texas, United States
University of Texas Southwestern Medical Center, Dallas, Texas, United States
University of Washington Medicine, Seattle, Washington, United States
San Diego Cardiac Center, San Diego, California, United States