1. Program on Reproductive and Adult Endocrinology (L.K.N.), National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892
2. Neuroendocrine Unit/Massachusetts General Hospital (B.M.K.B.), Boston, Massachusetts 02114
3. Medical College of Wisconsin (J.W.F.), Milwaukee, Wisconsin 53226
4. University of Sheffield (J.N.-P.), Sheffield S102JF, United Kingdom
5. William Harvey Research Institute, Queen Mary, University of London (M.O.S.), London EC1M6BQ, United Kingdom
6. University of Birmingham (P.M.S.), Birmingham B15 2TT, United Kingdom
7. Mayo Clinic (V.M.M.), Rochester, Minnesota 55905