1. Assistant Professor, Department of Dentistry, College of Medicine, Jeju National University, Jeju, Republic of Korea
2. Master’s Student, Department of Public Health, Graduate School of Public Health and Welfare, Jeju National University, Jeju, Republic of Korea
3. Medical Student, College of Medicine, Jeju National University, Jeju, Republic of Korea
4. Professor, Department of Dentistry, College of Medicine, Jeju National University, Jeju, Republic of Korea