1. Department of Psychiatry, Adolescent Clinic (L.J.M.v.N., L.d.H., H.B., T.v.A.), Laboratory of Endocrinology and Radiochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
2. Social Psychiatric Service Centre (J.G.S.), Laboratory of Endocrinology and Radiochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
3. Departments of Endocrinology and Metabolism (R.M.E.B., G.A., E.F., M.J.M.S., H.P.S.), Laboratory of Endocrinology and Radiochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
4. Radiology and Medical Physics (H.W.V.), Laboratory of Endocrinology and Radiochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands
5. Clinical Chemistry (M.T.A.), Laboratory of Endocrinology and Radiochemistry, Academic Medical Center, University of Amsterdam, 1105 AZ, Amsterdam, The Netherlands