1. Department of Preventive and Community Dentistry, School of Dentistry Pusan National University Yangsan Korea
2. Department of Cosmeceutical Science Daegu Haany University Daegu Korea
3. Department of Oral Pathology, School of Dentistry Pusan National University Yangsan Korea
4. BK21 PLUS Project, School of Dentistry Pusan National University Yangsan Korea