1. National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu 610064, Sichuan, China
2. Institute of Regulatory Science for Medical Devices, Sichuan University, Chengdu 610064, Sichuan, China
3. The Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu 610064, Sichuan, China
4. James Watt School of Engineering, University of Glasgow, Glasgow G12 8LT, U.K.