1. Department of Medicine, Endocrinology Section, Pituitary Center Rotterdam (S.J.C.M.M.N., S.E.F., R.A.F., J.A.M.J.L.J., L.J.H., A.J.v.d.L.)
2. The Pituitary Center Rotterdam (S.J.C.M.M.N., A.H.G.D., R.M.L.P., R.A.F., J.A.M.J.L.J., L.J.H., A.J.v.d.L.)
3. Department of Medicine, Metabolism Section (F.W.M.d.R.), Erasmus University Medical Center Rotterdam, 3000 CA Rotterdam, The Netherlands
4. Department of Neurosurgery (M.B.), University Hospital Erlangen, 91054 Erlangen, Germany
5. Medical Department (Endocrinology and Diabetes) (J.O.L.J.), Medical Research Laboratories, Clinical Institute, DK-8000 Aarhus C, Denmark