1. R&D Institute, Korea Tooth Bank; Seoul Republic of Korea
2. Department of Oral and Maxillofacial Surgery, Section of Dentistry; Seoul National University Bundang Hospital; Seongnam Republic of Korea
3. Department of Oral Histology-Departmental Biology; School of Dentistry, Seoul National University; Seoul Republic of Korea
4. Clinical Trial Center; Seoul National University Dental Hospital; Seoul South Korea