5. Must have a diagnosis of ischemic stroke and be stable enough to be randomized to treatment within 5 to 10 days after the onset of stroke symptoms. The stroke event needs to involve the middle cerebral artery (MCA) territory (cortical or subcortical) or posterior cerebral artery (PCA) territory with ischemic stroke confirmed by magnetic resonance imaging (MRI). Ischemic stroke is defined as death of an area of brain tissue (cerebral infarction) resulting from an inadequate supply of blood and oxygen to the brain.