1. From the Departments of Obstetrics and Gynecology (P.R.R.G, C.Y.), Internal Medicine (H.Z., S.C.S., S.J.W., D.J.D.), and Anatomy and Neurosciences (K.N.W.), The University of Texas Medical Branch, Galveston, Tex; and the Division of Endocrinology (R.F.G.), MD Anderson Cancer Center, Houston, Tex.