1. Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
2. Department of Electrical Engineering, National Chi Nan University, Nantou, Taiwan
3. Department of Photonics and Communication Engineering, Asia University, Taichung, Taiwan
4. Department of Physical Therapy, Chang Gung University, Taoyuan, Taiwan
5. Department of Electronics Engineering, Nan Kai University of Technology, Nantou, Taiwan
6. Division of Science & Technology, Hong Kong Community College, Hong Kong, Hong Kong
7. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan