Spong Catherine Y, Berghella Vincenzo, Wenstrom Katharine D, Mercer Brian M, Saade George R
Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland Department of Obstetrics and Gynecology, Thomas Jefferson University, Jefferson Medical College, Philadelphia, Pennsylvania Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Division, Women and Infants Hospital of Rhode Island, Providence, Rhode Island Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, Ohio Department of Obstetrics and Gynecology, University of Texas Medical Branch at Galveston, Galveston, Texas.
Obstet Gynecol. 2013 Mar;121(3):687. doi: 10.1097/AOG.0b013e3182854b36.