1. Department of Pediatric Cardiology, Children's Hospital of Wisconsin/Medical College of Wisconsin, Milwaukee, WI, USA
2. Department of Radiology, Advocate Illinois Masonic Medical Center, Chicago, IL, USA
3. Department of Medicine, Rush Medical Center, Chicago, IL, USA
4. Department of Cardiology, Creighton University Medical Center, Omaha, NE, USA
5. Rosalind Franklin University Medical Center, North Chicago, IL, USA