1. School of Dentistry Chung Shan Medical University Taichung Taiwan
2. Department of Dentistry Chung Shan Medical University Hospital Taichung Taiwan
3. Department of Pathology Chung Shan Medical University Hospital Taichung Taiwan
4. Institute of Medicine Chung Shan Medical University Taichung Taiwan
5. School of Biomedical Sciences Chung Shan Medical University Taichung Taiwan
6. Institute of Oral Science Chung Shan Medical University Taichung Taiwan
7. Department of Medical Research Chung Shan Medical University Hospital Taichung Taiwan