Affiliation: | a Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, New York University School of Medicine, Lenox Hill Hospital, New York, N b Human Genetics Program, New York University School of Medicine, Lenox Hill Hospital, New York, NY c Statistics and Mapping Laboratory, New York University, Lenox Hill Hospital, New York, NY d Department of Obstetrics and Gynecology, Lenox Hill Hospital, New York, NY e Genzyme Genetics, Philadelphia, PA f Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI |