1. School of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
2. College of Pharmacy, Pusan National University, Busan 609-735, Republic of Korea
3. Department of Oral & Maxillofacial Pathology, College of Dentistry, Wonkwang Bone Regeneration Institute, Daejeon Dental Hospital,Wonkwang University, Daejeon 302-120, Republic of Korea