Evaluation of Concomitant Administration of Cilostazol and Probucol on Biomarkers, Endothelial Function and Safety

"Treatment Group 1 (control) No cilostazol or probucol~Treatment Group 2 (cilostazol alone) 1 tablet cilostazol 100 mg PO BID~Treatment Group 3 (probucol alone) 1 tablet probucol 250 mg PO BID~Treatment Group 4 (concomitant cilostazol and probucol) 1 tablet cilostazol 100 mg PO BID, and 1 tablet probucol 250 mg PO BID"