Lappen Justin R, Talati Asha, Wieczorek Martin, Cossler Nancy
Department of Reproductive Biology, Case Western Reserve University School of Medicine, and the Department of Obstetrics and Gynecology, University Hospitals Case Medical Center, Cleveland, Ohio.
Obstet Gynecol. 2014 Mar;123(3):653-655. doi: 10.1097/AOG.0000000000000135.