1
School of Medicine, University of California, San Francisco, California
,
Timothy Wen
2
Division of Maternal Fetal Medicine, Department of Obstetrics, Gynecology, and Reproductive
Sciences, University of California, San Francisco, California
,
Alexander M. Friedman
3
Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Columbia
University Irving Medical Center, New York, New York
,
Mary E. D'Alton
3
Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, Columbia
University Irving Medical Center, New York, New York