1. Department of Nanobiomedical Science, BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Korea.
2. Department of Advanced General Dentistry, School of Dentistry, Dankook University, Cheonan, Korea.
3. Yonsei Wooil Dental Hospital, Cheonan, Korea.
4. Department of Oral Biochemistry, School of Dentistry, Dankook University, Cheonan, Korea.