[1] Baylor Coll Med, Dept Obstet & Gynecol, Houston, TX 77030 USA
[2] Baylor Coll Med, Dept Neurosurg, Houston, TX 77030 USA
[3] Baylor Coll Med, Dept Surg, Houston, TX 77030 USA
[4] Baylor Coll Med, Dept Anesthesiol, Houston, TX 77030 USA
[5] Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA
[6] Baylor Coll Med, Dept Radiol, Houston, TX 77030 USA
[7] Childrens Fetal Ctr, Houston, TX USA
[8] Vall DHebron Hosp, Dept Obstet & Gynecol, Barcelona, Spain
[9] Vall DHebron Hosp, Dept Surg, Barcelona, Spain