1 Center for Fetal Medicine and Women's Ultrasound, Department of Obstetrics and Gynecology at David Geffen School of Medicine at UCLA, 6310 South San Vicente Boulevard, Suite 520, Los Angeles, CA 90048, USA. Electronic address: ldplatt@gmail.com.
2 Center for Fetal Medicine and Women's Ultrasound, Department of Obstetrics and Gynecology at David Geffen School of Medicine at UCLA, 6310 South San Vicente Boulevard, Suite 520, Los Angeles, CA 90048, USA. Electronic address: chrishanmd@gmail.com.