[1] Vanderbilt Univ, Sch Med, Dept Radiol & Radiol Sci, Nashville, TN 37212 USA
[2] Vanderbilt Univ, Sch Med, Dept Obstet & Gynecol, Nashville, TN 37212 USA
[3] Katholieke Univ Leuven, Dept Dev & Regenerat, Leuven, Belgium
[4] Univ Hosp Leuven, Dept Obstet & Gynecol, Leuven, Belgium
[5] Harvard Med Sch, Brigham & Womens Hosp, Dept Radiol, Brookline, MA USA
[6] Harvard Med Sch, Brigham & Womens Hosp, Dept Obstet & Gynecol, Brookline, MA USA
[7] NYU Langone Hlth, Dept Radiol, New York, NY USA
[8] Imperial Coll London, Queen Charlottes & Chelsea Hosp, London, England
[9] Mayo Clin, Coll Med & Sci, Dept Radiol, Rochester, MN USA
[10] Childrens Hosp Philadelphia, Dept Radiol, Ctr Fetal Diag & Treatment, Philadelphia, PA 19104 USA
[11] Brigham & Womens Hosp, Dept Radiol, 75 Francis St, Boston, MA 02115 USA
[12] New York Univ Langone, Dept Obstet & Gynecol, New York, NY USA
[13] Johns Hopkins Univ, Sch Med, Russell H Morgan Dept Radiol & Radiol Sci, Baltimore, MD USA
[14] Einstein Med Ctr, Dept Radiol, Philadelphia, PA USA
[15] Vanderbilt Univ, Sch Med, Carell Childrens Hosp Vanderbilt, Dept Radiol & Radiol Sci, Nashville, TN USA
[16] McGill Univ, Ctr Hlth, Dept Radiol, Montreal, PQ, Canada
[17] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94143 USA
[18] Univ Toronto, Sunnybrook Res Inst, Dept Radiol, Toronto, ON, Canada