1. Departments of Endocrinology (S.V., Y.T., K.T., E.V.C., J.D.S., J.-M.K.), 9000 Ghent, Belgium
2. Pediatric Endocrinology (S.V., J.D.S.), 9000 Ghent, Belgium
3. Unit for Osteoporosis and Metabolic Bone Diseases (S.V., Y.T., K.T., E.V.C., J.-M.K.), Ghent University Hospital, 9000 Ghent, Belgium
4. Hormonology (T.F.), 9000 Ghent, Belgium
5. Department of Pediatric Endocrinology (I.R., J.D.S.), Brussel University Hospital, 1090 Brussels, Belgium