1. Department of Dentistry, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung 25440, Republic of Korea
2. Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea
3. Department of Oral Pathology, College of Dentistry, Gangneung-Wonju National University, Gangneung 25457, Republicof Korea
4. Department of Oral Anatomy, College of Dentistry and Research Institute of Oral Sciences, Gangneung-Wonju National University, Gangneung 25457, Republic of Korea