1. From the Wellcome Trust–Medical Research Council (MRC) Institute of Metabolic Science (J.W., J.M.A., C.K.B., M.E.W., R.H.) and the Department of Paediatrics (J.W., M.E.W., A.T., R.H.), University of Cambridge, and the Wolfson Diabetes and Endocrine Clinic, Cambridge University Hospitals NHS Foundation Trust (S.H.), Cambridge, the Department of Paediatric Diabetes, Leeds Children’s Hospital, Leeds (F.M.C., J.Y.), and Usher Institute, University of Edinburgh, Edinburgh (J.L.) — all in the United Kingdom;...