Affiliation: | 1. Department of Pediatrics, University of Utah, Salt Lake City, Utah;2. Division of Pediatric Cardiology, Department of Pediatrics, University of Utah, Salt Lake City, Utah;3. Department of Pediatrics, University of Utah, Salt Lake City, Utah Division of Pediatric Cardiology, Department of Pediatrics, University of Utah, Salt Lake City, Utah Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, Utah;4. Department of Pediatrics, University of Utah, Salt Lake City, Utah Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, Utah;5. Primary Children's Hospital, Salt Lake City, Utah |