author:H.S. OR author:Markus OR author:D.W. OR author:Droste OR author:M. OR author:Kaps OR Dual antiplatelet therapy with clopidogrel and aspirin in symptomatic carotid stenosis evaluated using doppler embolic signal detection: the clopidogrel and aspirin for reduction of emboli in symptomatic carotid stenosis (Caress) trial
