1. Institute of Oral Sciences, Chung Shan Medical University, Taichung, Taiwan
2. School of Dentistry, Chung Shan Medical University, Taichung, Taiwan
3. Department of Dentistry, Chung Shan Medical University Hospital, Taichung, Taiwan
4. Oral Medicine Research Center, Chung Shan Medical University, Taichung, Taiwan
5. Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan