1. Department of General Internal Medicine (T.B.K., C.J.T., J.M.K., A.F.H.S., J.d.G., L.J.H.v.T., R.S.), Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
2. Department of Endocrinology (J.M.K., A.R.H.), Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
3. Department of Chemical Endocrinology (F.C.G.S.), Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands
4. Department of Pathology (J.v.d.L.), Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands