1 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of California, Los Angeles, Los Angeles, CA.
2 Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT.
3 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of California, Los Angeles, Los Angeles, CA; Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT.
4 Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, University of Miami Miller School of Medicine, Miami, FL.
5 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of California, Los Angeles, Los Angeles, CA; Center for Fetal Medicine and Women's Ultrasound, Los Angeles, CA, 6310 San Vicente Blvd., Ste. 520, Los Angeles, CA 90048.
6 Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University of California, Los Angeles, Los Angeles, CA; Center for Fetal Medicine and Women's Ultrasound, Los Angeles, CA, 6310 San Vicente Blvd., Ste. 520, Los Angeles, CA 90048. Electronic address: [email protected].