1. Department of Dentistry, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
2. Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyung Hee University, Seoul 02447, Republic of Korea
3. Department of Maxillofacial Regenerative Medicine, School of Dentistry, Kyung Hee University, Seoul 02447, Republic of Korea
4. Department of Dental Hygiene, College of Medical Science, Konyang University, Daejeon 35365, Republic of Korea