1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology; David Geffen School of Medicine at UCLA; Los Angeles CA USA
2. Fetal Diagnostic Centers; Pasadena CA USA
3. TomTec Corporation; Chicago IL USA
4. Division of Pediatric Cardiology, Department of Pediatrics, UCLA Mattel Children's Hospital; David Geffen School of Medicine at UCLA; Los Angeles CA USA