1. Department of Pediatrics (K.J.P.-K., M.E., C.F.M., H.L.C.v.d.G.), Radboud University Medical Center, 6500HB Nijmegen, The Netherlands
2. Department of Laboratory Medicine (M.E., A.E.v.H., F.C.G.J.S.), Radboud University Medical Center, 6500HB Nijmegen, The Netherlands
3. Centre for Endocrinology, Diabetes and Metabolism, School of Clinical and Experimental Medicine (A.G., N.K.), University of Birmingham, Birmingham B15 2TT, United Kingdom
4. Department of Radiation Oncology (P.N.S.), Radboud University Medical Center, 6500HB Nijmegen, The Netherlands