1. Institute
of Oral Medicine, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
2. Institute
of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli 35053, Taiwan
3. Department
of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan
4. Institute
of Physics, Academia Sinica, Taipei 115, Taiwan