1. Division of Maternal‐Fetal Medicine, Department of Obstetrics and GynecologyDavid Geffen School of Medicine at UCLA CA USA
2. Fetal Diagnostic CentersPasadena, Tarzana, and Lancaster CA USA
3. TomTec Corporation Chicago IL USA
4. Division of Pediatric Cardiology, Department of PediatricsUCLA Mattel Children's Hospital, David Geffen School of Medicine at UCLA CA USA