[1] Univ Washington, Pacific NW Diabet Res Inst, Div Endocrinol & Metab, Dept Med, Seattle, WA 98122 USA
[2] Univ Washington, Pacific NW Diabet Res Inst, Div Endocrinol & Metab, Dept Pharmacol, Seattle, WA 98122 USA
[3] Amer Diabet Assoc, Alexandria, VA 22311 USA
[4] Univ Minnesota, Sch Med, Div Endocrinol & Diabet, Minneapolis, MN 55455 USA