[1] Duke Univ, Med Ctr, Dept Med & Cell Biol, Durham, NC 27710 USA
[2] GlaxoSmithKline, Dept Mol Endocrinol, Res Triangle Pk, NC USA
[3] GlaxoSmithKline, Dept Metab Dis, Res Triangle Pk, NC USA
[4] E Carolina Univ, Dept Biochem, Greenville, NC USA
[5] E Carolina Univ, Human Performance Lab, Greenville, NC USA