1. Clinical Professor, Department of Periodontology, Chosun University School of Dentistry, Gwangju, Republic of Korea
2. Doctor of Dental Clinic, Department of Periodontology, Chosun University School of Dentistry, Gwangju, Republic of Korea
3. Assistant Professor, Department of Periodontology, Chosun University School of Dentistry, Gwangju, Republic of Korea
4. Professor, Department of Periodontology, Chosun University School of Dentistry, Gwangju, Republic of Korea