1. School of Information Engineering, Changchun Sci-Tech University, Changchun 130600, China
2. Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung 41349, Taiwan
3. Department of Computer Science and Engineering, National Chung-Hsing University, Taichung 402202, Taiwan
4. Department of Computer Science and Information Engineering, Asia University, Taichung 413305, Taiwan
5. Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 404328, Taiwan