1. Department of Oral Pathology, School of Dentistry, Chonnam National University, Gwangju, Korea.
2. Department of Dentistry, Graduate School, Kyung Hee University, Seoul, Korea.
3. Interdisciplinary Program of Biomedical Engineering, Graduate School, Chonnam National University, Gwangju, Korea.
4. Department of Pediatric Dentistry, Kyung Hee University, College of Dentistry, Kyung Hee University Medical Center, Seoul, Korea.
5. Department of Pediatric Dentistry, Kyung Hee University School of Dentistry, Seoul, Korea.