[1] Folkhalsan Inst Genet, Helsinki, Finland
[2] Abdominal Ctr Nephrol, Helsinki, Finland
[3] Boston Childrens Hosp, Div Endocrinol, Boston, MA USA
[4] Harvard Univ, Sch Med, Dept Pediat, Cambridge, MA 02138 USA
[5] Broad Inst, Program Med & Populat Genet, Cambridge, MA USA
[6] Massachusetts Gen Hosp, Ctr Human Genet Res, Dept Med, Boston, MA 02114 USA
[7] Massachusetts Gen Hosp, Diabet Unit, Boston, MA 02114 USA