1. Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
2. School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan 430074, China
3. School of Nursing, The Hong Kong Polytechnic University, Hong Kong 999077, China
4. Research Institute of Smart Ageing, The Hong Kong Polytechnic University, Hong Kong 999077, China