1. Department of Oral and Maxillofacial Radiology and Wonkwang Dental Research Institute, College of Dentistry, Wonkwang University, Iksan, Korea.
2. Department of Oral and Maxillofacial Surgery, Wonkwang Bone Regeneration Institute, College of Dentistry, Wonkwang University, Iksan, Korea.
3. Department of Pathology, School of Medicine, Eulji University, Daejeon, Korea.