1. Department of Molecular Genetics; School of Dentistry and Dental Research Institute; BK21 Program; Seoul National University; Seoul Korea
2. Department of Periodontology; School of Dentistry and Dental Research Institute; BK21 Program; Seoul National University; Seoul Korea
3. Department of Oral Histology-Developmental Biology; School of Dentistry and Dental Research Institute; BK21 Program; Seoul National University; Seoul Korea