1. Department of Biochemistry, School of Dentistry, Kyungpook National University, Daegu, Korea.
2. Department of Periodontology, School of Dentistry, Kyungpook National University.
3. Department of Cell and Developmental Biology, School of Dentistry, Seoul National University, Seoul, Korea.
4. Institute for Hard Tissue and Bone Regeneration, Kyungpook National University.