We assessed ( @ ) endothelial function as flow-mediated dilation of the brachial artery , ( @ ) arterial stiffness and central augmentation index using applanation tonometry , ( @ ) vascular function as fingertip reactive hyperemia index , ( @ ) inflammation by measuring plasma CD@ ligand and serum high-sensitivity c-reactive protein levels , ( @ ) oxidative stress by measuring plasma aminothiols , and ( @ ) circulating progenitor cells , at baseline and at the end of each @-week treatment period .