1. Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 10617, Taiwan
2. Department of Stomatology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
3. School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan
4. Department of Biomedical Engineering, Ming Chuan University, Taoyuan 33348, Taiwan