1. Departments of Pediatrics (Cardiology) and Radiology, The Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA, (M.A.F.).
2. Division of Cardiology, Department of Pediatrics, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA, (M.A.F.).
3. Department of Pediatrics (Cardiology) and Radiology, The University of California-San Francisco School of Medicine, San Francisco, USA, (S.A.).
4. Division of Cardiovascular Medicine, Oregon Health and Sciences University, Portland, USA, (C.B.).
5. Department of Radiology, University of Colorado, Denver, USA, (L.B.).
6. Department of Radiology and Biomedical Imaging, The University of California-San Francisco School of Medicine, San Francisco, USA, (T.C.).
7. Department of Pediatrics (Cardiology), Indiana University School of Medicine, Indianapolis, USA, (T.J.).
8. Department of Pediatrics (Cardiology), University College London, London, UK, (V.M.).
9. Department of Pediatrics (Cardiology), University of Cincinnati School of Medicine, Cincinnati, USA, (M.T.).
10. Department of Diagnostic Imaging, University of Zurich, Zurich, Switzerland, (E.V.-B.).
11. Department of Pediatrics (Cardiology), University Hospitals-Cleveland, Cleaveland, USA (C.W.).