Wax Joseph, Minkoff Howard, Johnson Anthony, Coleman Beverly, Levine Deborah, Helfgott Andrew, O'Keeffe Daniel, Henningsen Charlotte, Benson Carol
MMC Ob/Gyn Associates, 887 Congress St, Suite 200, Portland, ME 04102 USA.
J Ultrasound Med. 2014 Feb;33(2):189-95. doi: 10.7863/ultra.33.2.189.