1. Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
2. School of Electrical Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, P. R. China
3. Department of Medical Engineering, University of South Florida, Tampa, FL 33620, USA
4. Guangdong Provincial Key Laboratory of Advanced Biomaterials, Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China