[1] St Marys Hosp, Dept Endocrinol & Diabet, London, England
[2] Univ Washington, Sch Publ Hlth & Community Med, Dept Epidemiol, Seattle, WA 98195 USA
[3] Univ Washington, Sch Publ Hlth & Community Med, Inst Publ Hlth Genet, Seattle, WA 98195 USA
[4] UCL, Ctr Cardiovasc Genet, London WC1E 6BT, England