1. National Engineering Research Center for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu, Sichuan 610064, P. R. China
2. Department of Medical Genetics, Zunyi Medical University, No. 6 West Xuefu Road, Zunyi, Guizhou 563000, P. R. China
3. Sichuan Testing Center for Biomaterials and Medical Devices, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China