[1] Newcastle Univ, Inst Cellular Med, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[2] Kings Coll London, Diabet Res Grp, London WC2R 2LS, England
[3] Royal Free Hampstead NHS Trust, Dept Diabet, London, England
[4] Univ Manchester, Manchester Diabet Ctr, Manchester, Lancs, England
[5] Univ Edinburgh, Endocrinol Unit, Edinburgh, Midlothian, Scotland