1. aDivision of Adolescent and Young Adult Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. bDivision of Pediatric Cardiology, Texas Children's Hospital, Houston, Texas
3. cDepartment of Pediatrics, University of Washington, Seattle, Washington (Blackfeet)
4. dDepartment of Pediatrics, School of Medicine, Oregon Health & Science University, Portland, Oregon, (Confederated Tribes of Grand Ronde)