1. Division of Maternal‐Fetal Medicine, Department of Obstetrics and Gynecology David Geffen School of Medicine at UCLA Los Angeles CA USA
2. Department of Obstetrics and Gynecology Wayne State University Detroit MI USA
3. Fetal Diagnostic Centers, Pasadena, Tarzana, and Lancaster Pasadena CA USA
4. TomTec Munich Germany
5. Division of Pediatric Cardiology, Department of Pediatrics Mattel Children's Hospital UCLA, David Geffen School of Medicine at UCLA Los Angeles CA USA