The overall purpose of the LIMITS study is to determine if serum levels of inflammatory markers—such as hsCRP, serum amyloid A (SAA), CD40 ligand (CD40L), and monocyte chemoattractant protein-1 (MCP-1)—predict recurrent stroke and other vascular events among people with a history of small artery ischemic stroke. The project will also determine if these markers predict which people will respond best to dual antiplatelet therapy with clopidogrel and aspirin.