1. Department of Oral Biology, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
2. Oral Cancer Research Institute, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
3. BK21 FOUR Project, Yonsei University College of Dentistry, Seoul 03722, Republic of Korea
4. Department of Applied Life Science, The Graduate School, Yonsei University, Seoul 03722, Republic of Korea
5. Department of Dental Hygiene, College of Science and Engineering, Kyungpook National University, Sangju 37224, Republic of Korea