1. Department of Computer Science and Information Engineering, Providence University, Taichung, Taiwan.
2. Network and Computer Centre, National Chiao Tung University, Hsin Chu, Taiwan.
3. Department of Software Engineering, National Kaohsiung Normal University, Kaohsiung, Taiwan.
4. Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan.
5. Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.
6. Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan.