<qa>  What is the DM, MS, or no DMMS?All patients with stable coronary artery disease and successful DES implantation in native coronary arteries including high risk features, eg, left main stenosis, bifurcations or in-stent restenosis will be eligible. They will be stratified at entry according to their metabolic status DM, MS, or no DMMS. Measurements will be performed both 6-24 hours after clopidogrel loading dose acute effects and 4 months later under clopidogrel maintenance dose chronic effects. 