1. The Center for Research in Reproduction and Division of Endocrinology (C.R.M., K.A.P., S.C., C.A.E., J.C.M.), Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia 22908
2. Division of Reproductive Endocrinology and Infertility (R.Y., R.J.C.), Department of Reproductive Medicine, University of California, San Diego, California 92103
3. Division of Endocrinology (C.M.F.), Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan 48109