John O. Schorge, M.D., Joseph I. Schaffer, M.D., Lisa M. Halvorson, M.D., Barbara L. Hoffman, M.D., Karen D. Bradshaw, M.D., F. Gary Cunningham, M.D. all of the Department of Obstetrics and Gynecology, Parkland Hospital, University of Texas, Southwestern Medical Center Dallas, Texas.