1. CAE/NAE National Engineering Research Center for Biomaterials Sichuan University 29# Wangjiang Road Chengdu Sichuan 610064 P. R. China
2. College of Biomedical Engineering Sichuan University 29# Wangjiang Road Chengdu Sichuan 610064 P. R. China
3. Sichuan Testing Center for Biomaterials and Medical Devices Sichuan University 29# Wangjiang Road Chengdu 610064 P. R. China