1. Netherlands Institute for Brain Research (A.K., S.E.l.F., J.W., R.M.B.), Academic Medical Center, 1105 AZ Amsterdam
2. Department of Endocrinology and Metabolism, F5–171 (E.F., O.B.), Academic Medical Center, 1105 AZ Amsterdam
3. Department of Endocrinology C4-R, Leiden University Medical Center (J.A.R.), 2300 RC Leiden, Amsterdam
4. Department of Clinical Chemistry, Laboratory of Endocrinology (E.E.), Academic Medical Center, 1105 AZ Amsterdam