1. Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong, SAR, China
2. School of Computer Science and Technology, Beijing Jiaotong University, Beijing, China
3. Department of Electrical Engineering, City University of Hong Kong, Hong Kong, SAR, China
4. MOE Key Laboratory for Neuroinformation, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu, China
5. School of Nursing, The Hong Kong Polytechnic University, Hong Kong, SAR, China