Reduced microvascular volume and hemispherically deficient vasoreactivity to hypercapnia in acute ischemia: MRI study using permanent middle cerebral artery occlusion rat model. - Suh JY; Shim WH; Cho G; Fan X; Kwon SJ; Kim JK; Dai G; Wang X; Kim YR (Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism, 2015)