1. Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
2. Chang-Hua Hospital, Department of Health, Executive Yuan, Taiwan
3. Institute for Neural Computation, University of California San Diego, La Jolla, CA, USA
4. Department of Radiology, China Medical University Hospital, Taichung, Taiwan
5. Department of Electric Engineering, National Chung-Shin University, Taichung, Taiwan
6. Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan