1. Department of Conservative Dentistry, School of Dentistry; Kyung Hee University; Seoul Korea
2. Biomedical Research Institute; Korea Institute of Science and Technology; Seoul Korea
3. Future Convergence Research Division; Korea Institute of Science and Technology; Seoul Korea
4. Division of Endodontology, Department of Oral Health and Diagnostic Sciences, School of Dental Medicine; University of Connecticut Health Center; Farmington Connecticut
5. Schulich School of Medicine and Dentistry; University of Western Ontario; London Canada
6. Department of Conservative Dentistry, Dental Research Institute and BK21 Program, Seoul National University Dental Hospital, Seoul National; University School of Dentistry; Seoul Korea