1. Department of Oral Physiology, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50610, Korea
2. Department of Pharmacology, Pusan National University School of Medicine, Pusan National University, Yangsan 50610, Korea
3. Department of Dental Pharmacology, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan 50610, Korea