1. Cell and Matrix Research Institute, Kyungpook National University School of Medicine, Daegu 700-422, Korea.
2. Department of Biochemistry and Cell Biology, Kyungpook National University School of Medicine, Daegu 700-422, Korea.
3. Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu 700-422, Korea.
4. Department of Oral Pathology, Institute for Hard tissue and Bio-tooth Regeneration, Kyungpook National University School of Dentistry, Daegu 700-422, Korea.