Matrix metalloproteinase-9 and tissue inhibitor of metalloproteinase-1 expression in early focal cerebral infarction following urokinase  thrombolysis in rats
Yuqiang Song, Hongli Zou, Guofeng Wang, Hongxia Yang, Zhaohong Xie, Jianzhong Bi
Neural Regeneration Research . 2012, (17): 1325 -1330 .