1. Department of Pediatric Endocrinology (M.J.J.F., J.R.), VU University Medical Center, Amsterdam 1007 MB, The Netherlands
2. Department of Epidemiology Documentation and Health Promotion (M.v.E., E.M.L.), Public Health Service Amsterdam, Amsterdam 1018 WT, The Netherlands
3. Department of Health Sciences (M.v.E.), VU University Medical Center, Amsterdam 1007 MB, The Netherlands
4. Department of Developmental Psychology (E.M.L.), Tilburg University, Tilburg 5000 LE, The Netherlands
5. Department of Public Health (T.G.M.V.), Academic Medical Center–University of Amsterdam, Amsterdam 1100 DD, The Netherlands