1 Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX. Electronic address: christina.herrera@utsouthwestern.edu.
2 University of Texas Southwestern Medical School, Dallas, TX.
3 Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX.
4 Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX.
5 Department of Radiology University of Texas Southwestern Medical Center Dallas, TX; Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center Dallas TX.