1Department of Periodontology, Chosun University, Korea.
2Department of Oral Histology, Chosun University, Korea.
3Department of Oral and Maxillofacial Surgery, Chosun University, Korea.
4Department of Oral Anatomy, Chosun University, Korea.
5Department of Oral Biochemistry, College of Dentistry, Chosun University, Korea.
6Oral Biology Research Institute, Chosun University, Korea.
7Department of Periodontology, College of Dentistry, Yonsei University, Korea.
Corresponding author: Byung-Ock Kim, Department of Periodontology, College of Dentistry, Chosun University, 421 Seoseok-Dong, Dong-Ku, Gwang-ju, 501-759, Korea, Tel:+82-62-220-3856, Fax: +82-62-224-4664, bobkim@chosun.ac.kr