[1] Univ Calif Los Angeles, David Geffen Sch Med, Dept Obstet & Gynecol, Div Maternal Fetal Med, Los Angeles, CA 90024 USA
[2] Fetal Diagnost Ctr, Pasadena, CA 91105 USA
[3] Fetal Diagnost Ctr, Tarzana, CA 91356 USA
[4] Fetal Diagnost Ctr, Lancaster, CA 93534 USA
[5] Univ Calif Los Angeles, David Geffen Sch Med, Mattel Childrens Hosp, Div Pediat Cardiol,Dept Pediat, Los Angeles, CA 90024 USA