title: Reply.
authors.affiliation: Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, New York University Langone Medical Center, 550 First Avenue, NBV 9 E 2, New York, NY 10016.
authors.forename: Margaret
authors.initials: M
authors.lastname: Dziadosz
authors.affiliation: Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, New York University Langone Medical Center, 550 First Avenue, NBV 9 E 2, New York, NY 10016. Electronic address: bruce.young@nyumc.org.
authors.forename: Bruce K
authors.initials: BK
authors.lastname: Young
authors.affiliation: Department of Pathology, New York University Langone Medical Center, 550 First Avenue, New York, NY 10016.
authors.forename: Ross S
authors.initials: RS
authors.lastname: Basch