1. Center of Medical Product Technical Inspection , 610015 Chengdu , China
2. Sichuan Jianyang Haite Co., Ltd , 641400 Chengdu , China
3. School of Mechanical Engineering, Sichuan University , 610065 Chengdu , China
4. National Engineering Research Center for Biomaterials, School of Biomedical Engineering, Sichuan University , 610064 Chengdu , China