1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
2. Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
3. Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Peking Union Medical College, Chengdu, Sichuan 610052, P. R. China
4. Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China