[1] University of California Irvine Medical Center,Division of Maternal
[2] University of Texas Southwestern Medical Center at Dallas,Fetal Medicine, Department of Obstetrics and Gynecology
[3] Kaiser Permanente Orange County,Division of Maternal
[4] Independent Consultant,Fetal Medicine, Department of Obstetrics & Gynecology
[5] Memorial Care Center for Women at Miller Children’s Hospital,Department of Obstetrics and Gynecology
[6] Long Beach Memorial Medical Center,Department of Obstetrics and Gynecology