[1] Univ Birmingham, Inst Biomed Res, Coll Med & Dent Sci, Sch Clin & Expt Med, Birmingham B15 2TT, W Midlands, England
[2] Univ Oxford, Churchill Hosp, Wellcome Trust Ctr Human Genet, Oxford, England
[3] Univ Oxford, Churchill Hosp, Dept Endocrinol, Oxford, England
[4] Odense Univ Hosp, Dept Endocrinol & Metab, Odense, Denmark
[5] Univ Amsterdam, Acad Med Ctr, Dept Endocrinol & Metab, NL-1012 WX Amsterdam, Netherlands
[6] Univ Glasgow, Glasgow, Lanark, Scotland
[7] Univ Sheffield, Sch Med, Sheffield, S Yorkshire, England