1. Department of Oral Physiology, School of Dentistry, Dankook University, Cheonan, South Korea.
2. Biomaterials and Tissue Engineering Laboratory, Department of Nanobiomedical Science and World Class University Research Center, Dankook University Graduate School, Cheonan, South Korea.
3. Department of Biomaterials Science, School of Dentistry, Dankook University, Cheonan, South Korea.
4. Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, South Korea.