1. Bonecell Biotech Inc, Dunsan-dong, Seo-gu; Daejeon 302-830 Republic of Korea
2. Wonkwang Bone Regeneration Research Institute, Wonkwang University; Iksan 570-749 Republic of Korea
3. Department of Oral and Maxillofacial Surgery; Daejeon Dental Hospital, College of Dentistry, Wonkwang University; 302-830 Republic of Korea