1. Department of Paediatrics (A.T., D.C., M.L.M., K.M., D.B.D.), Cambridge, United Kingdom
2. Wolfson Brain Imaging Centre (A.S.), University of Cambridge, CB2 0QQ, Cambridge, United Kingdom
3. Department of Endocrinology (S.W.J., A.V.), Rigshospitalet and Copenhagen University, DK-2100 Denmark
4. Oxford Centre for Diabetes, Endocrinology, and Metabolism (N.R.H.), University of Oxford, Oxford, OX3 7LE, United Kingdom
5. Medical Research Council (MRC) Metabolic Diseases Unit (G.S.H.Y.), University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, CB2 0QQ, United Kingdom
6. MRC Human Nutrition Research of Growth and Reproduction (L.B.); CB1 9NL, United Kingdom
7. Department of Growth and Reproduction (A.J.), Rigshospitalet, Faculty of Health and Medical Sciences, DK-2100 Denmark
8. National Institute for Health Research Cambridge Comprehensive Biomedical Research Centre (D.B.D.), Cambridge, CB1 9NL, United Kingdom