1. Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 330-714, South Korea
2. Department of Nanobiomedical Science & BK21 PLUS Global Research Center for Regenerative Medicine, Dankook University, Cheonan 330-714, South Korea
3. Drug Research Institute, Mongolian University of Pharmaceutical Science, Ulaanbaatar 14250, Mongolia
4. Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan 330-714, South Korea
5. Department of Pre-medi., College of Medicine, Dankook University, Cheonan 31116, South Korea
6. UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan 31116, South Korea