1. Reproductive and Adult Endocrinology Program (H.J.L.M.T., B.H., L.M., K.T.A., K.P.), Eunice Kennedy Shriver National Institutes of Child Health and Human Development, Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892
2. Department of Endocrinology (H.J.L.M.T.), Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
3. Departments of Nuclear Medicine (C.C.C., J.A.C., M.W.), Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892
4. Nuclear Medicine Section (J.A.C.), Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York 10021
5. Diagnostic Radiology (A.L.), Warren G. Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892
6. Department of Internal Medicine (B.H.), Division of Endocrinology, University Hospital Maastricht, 6202 AZ Maastricht, The Netherlands
7. Institute of Clinical Chemistry and Laboratory Medicine and the Department of Medicine (G.E.), University of Dresden, 01307 Dresden, Germany