[1] Massachusetts Gen Hosp, Ctr Diabet, Boston, MA 02114 USA
[2] Harvard Univ, Sch Med, Boston, MA 02115 USA
[3] Univ N Carolina, Sch Med, Chapel Hill, NC 27515 USA
[4] Charles R Drew Univ Med & Sci, Clin Trial Unit, Los Angeles, CA 90059 USA
[5] Vrije Univ Amsterdam, Med Ctr, Ctr Diabet, Amsterdam, Netherlands
[6] Univ Oxford, Diabet Trials Unit, Oxford Ctr Diabet, Oxford OX1 2JD, England
[7] Yale Univ, Sch Med, Dept Internal Med & Endocrinol, New Haven, CT 06520 USA
[8] Univ Toronto, Mt Sinai Hosp, Dept Endocrinol, Toronto, ON M5G 1X5, Canada
[9] Univ Toronto, Mt Sinai Hosp, Dept Metab, Toronto, ON M5G 1X5, Canada