Point-of-care measurement of clopidogrel responsiveness predicts clinical outcome in patients undergoing percutaneous coronary intervention: results of the ARMYDA-PRO (antiplatelet therapy for reduction of myocardial damage during angioplasty-platelet reactivity predicts outcome) study - Patti, G; Nusca, A; Mangiacapra, F (J Am Coll Cardiol, 2008)