[1] Univ Exeter, Dept Diabet & Vasc Med, Exeter, Devon, England
[2] Salisbury Dist Hosp, Wessex Reg Genet Lab, Salisbury, Wilts, England
[3] Royal Hosp Sick Children, Dept Child Hlth, Bristol BS2 8BJ, Avon, England
[4] Univ Newcastle Upon Tyne, Dept Diabet & Metab, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[5] Univ London Imperial Coll Sci & Technol, Complex Traits Anal Grp, London, England