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