[1] Univ Ferrara, Dept Life Sci & Biotechnol, I-44100 Ferrara, Italy
[2] Univ Oxford, Wellcome Trust Ctr Human Genet, Oxford, England
[3] Boston Univ, Sch Publ Hlth, Dept Biostat, Boston, MA USA
[4] NHLBI, Framingham Heart Study, Framingham, MA USA
[5] Massachusetts Gen Hosp, Div Gen Med, Boston, MA 02114 USA
[6] Harvard Univ, Sch Med, Dept Med, Boston, MA USA
[7] Univ Oxford, Oxford Ctr Diabet Endocrinol & Metab, Oxford, England