50 percent National Stroke Association National Stroke Association National Stroke Association 50 percent 50 percent 40 percent National Stroke Association National Stroke Association National Stroke Association 40 percent 40 percent 50 percent 40 percent http://www.stroke.org/understand-stroke/what-stroke/what-tia National Stroke Association National Stroke Association National Stroke Association 50 percent National Stroke Association 40 percent National Stroke Association National Stroke Association National Stroke Association National Stroke Association National Stroke Association 50 percent 40 percent 40 percent National Stroke Association National Stroke Association National Stroke Association 50 percent National Stroke Association National Stroke Association National Stroke Association National Stroke Association http://www.stroke.org/understand-stroke/what-stroke/what-tia National Stroke Association 40 percent National Stroke Association National Stroke Association National Stroke Association 50 percent National Stroke Association 50 percent National Stroke Association http://www.stroke.org/understand-stroke/what-stroke/what-tia National Stroke Association 50 percent National Stroke Association 40 percent National Stroke Association 40 percent http://www.stroke.org/understand-stroke/what-stroke/what-tia National Stroke Association