1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea
2. Current affiliation: Dalian Medical University, School of Stomatology, Dalian, Liaoning, China
3. Department of Pathology, Chonnam National University Medical School, Gwangju 61469, Republic of Korea
4. Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju 61186, Republic of Korea