An Observational Study of the Relationship Between Outcome and Platelet Reactivity in Chinese Patients Undergoing PCI Loading with 600 mg Clopidogrel oleh Jing-xiu Li, Ling Weng, Xue-qi Li, Yang Li, Shu-jun Yan, Zhao-yan Song, Xue-yan Zhang, Li Cha, Lin Lin, Tian-shu Yang, Wei-jun Lv, Ying-nan Dai, Ye-ping Chen, De-Jun Xia, Xin Li, En-ze Jin