[1] Emory Univ, Sch Med, Dept Med, Div Endocrinol Metab & Lipids, Atlanta, GA 30322 USA
[2] Boston Univ, Sch Med, Dept Med, Sect Endocrinol Diabet & Nutr, Boston, MA 02118 USA
[3] Boston Univ, Sch Med, Dept Med, Gen Internal Med Sect, Boston, MA 02118 USA