1. Fetal Diagnostic Centers of Pasadena, Tarzana, and Lancaster Los Angeles California USA
2. Division of Maternal‐Fetal Medicine, Department of Obstetrics and Gynecology David Geffen School of Medicine, UCLA Los Angeles California USA
3. Department of Obstetrics and Gynecology Wayne State University Detroit Michigan USA
4. The Heart Institute and the Colorado Fetal Care Center, Departments of Pediatrics and Obstetrics Children's Hospital Colorado, University of Colorado School of Medicine Aurora Colorado USA
5. Division of Pediatric Cardiology, Department of Pediatrics UCLA Mattel Children's Hospital, David Geffen School of Medicine at UCLA Los Angeles California USA