1. Stanford Children's Health Lucile Packard Children's Hospital Palo Alto California USA
2. Division of Pediatric Cardiology, Department of Pediatrics, Children's Hospital Los Angeles, Keck School of Medicine University of Southern California Los Angeles California USA
3. Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Keck School of Medicine University of Southern California Los Angeles California USA
4. Division of Pediatric Cardiology, Department of Pediatrics, UCLA Mattel Children's Hospital David Geffen School of Medicine at UCLA Los Angeles California USA
5. Fetal Diagnostic Centers Pasadena California USA
6. Department of Obstetrics and Gynecology David Geffen School of Medicine, UCLA Los Angeles California USA