1. Institute of Medical Science and Technology
2. National Sun Yat-sen University
3. Kaohsiung 80424
4. Taiwan
5. Institute of Biomedical Sciences
6. Department of Neurosurgery
7. Chang Gung Memorial Hospital
8. Taoyuan 33305
9. School of Medicine
10. Department of Electrical Engineering
11. Chang Gung University
12. Taoyuan 33302