[1] Harvard Univ, Sch Med, Brigham & Womens Hosp, Dept Med,Div Hematol, Boston, MA 02115 USA
[2] Massachusetts Gen Hosp, Dept Med, Diabet Unit, Boston, MA 02114 USA
[3] Univ S Florida, Dept Biochem & Mol Biol, Tampa, FL 33612 USA
[4] Univ S Florida, Suncoast Gerontol Ctr, Tampa, FL 33612 USA