1. Center for Research in Reproduction and Division of Endocrinology (S.K.B., C.R.M., S.C., K.D.H., C.A.E., J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22908
2. Division of Reproductive Endocrinology (J.R.C.), Department of Reproductive Medicine, University of California-San Diego, La Jolla, California 92093