1. Division of Pediatric Cardiology, Children's HospitalUniversity of Southern California Keck School of Medicine of USC Los Angeles California USA
2. Division of Pediatric Cardiology, Department of Pediatrics, St. Louis Children's HospitalWashington University School of Medicine St Louis Missouri USA
3. Divison of Pediatric CardiologyUniversity of California Davis Children's Hospital Sacramento California USA
4. The Heart Center, Nationwide Children's Hospital OH Columbus USA
5. Division of Maternal Fetal Medicine, Department of Obstetrics and GynecologyUniversity of Southern California Keck School of Medicine Los Angeles California USA
6. Department of Physiology and Biophysics, Keck School of MedicineUniversity of Southern California Los Angeles California USA
7. Department of Obstetrics and Gynecology, Hospital Universitario 12 de Octubre, Facultad de MedicinaUniversidad Complutense de Madrid, Madrid Spain
8. The Fetal Center, Children's Memorial Hermann Hospital and the Department of Obstetrics and Gynecology, McGovern Medical School, UTHealth Houston Texas USA
9. Hospital Italiano, Buenos Aires Argentina
10. Division of Pediatric Cardiology, Children's HospitalUniversity of Bonn Germany
11. Division of Cardiology, Hospital for Sick Children, Toronto, Ontario Canada
12. Division of Cardiology, Department of PediatricsBaylor College of Medicine and Texas Children's Hospital Houston Texas USA
13. Department of ObstetricsLeiden University Medical Center Leiden The Netherlands
14. Evelina Children's Hospital London UK
15. Division of Pediatric CardiologyDepartment of Pediatrics and the Fetal Treatment Center at UCSF Benioff Children's Hospital San Francisco California USA