[1] Gachon Med Sch, Gil Heart Ctr, Dept Cardiol, Inchon 405760, South Korea
[2] NIH, Diabet Unit, Clin Invest Lab, Natl Ctr Complementary & Alternat Med, Bethesda, MD 20892 USA
[3] Gachon Med Sch, Lab Med, Dept Cardiol, Inchon 405760, South Korea
[4] Ewha Womans Univ, Dept Stat, Seoul 120750, South Korea