3018682 MCAO middle cerebral artery occlusion 7068 1371466 MCAO/R middle cerebral artery occlusion/reperfusion 778 1963856 MACO/R middle cerebral artery occlusion/reperfusion 9 558763 MCAO/IR middle cerebral artery occlusion/reperfusion 4 1153533 M/R middle cerebral artery occlusion/reperfusion 2 1221006 MCA middle cerebral artery occlusion and reperfusion 2