Affiliation: | 1. Postgraduate student, Department of Dentistry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea;2. Postgraduate student, Department of Dentistry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea;3. Professor, Department of Dentistry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea;4. Professor, Department of Dentistry, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea |