1. Department of Oral and Maxillofacial Surgery; College of Dentistry; Yonsei University; Seoul Korea
2. Department of Advanced General Dentistry; College of Dentistry; Yonsei University; Seoul Korea
3. Oral Science Research Center; College of Dentistry; Yonsei University; Seoul Korea
4. Department of Oral and Maxillofacial Surgery; National Health Insurance Service; Ilsan Hospital; Goyang-si Korea
5. Stomatology and Maxillo-facial Surgery Unit; Nantes University Hospital; Nantes Cedex 1 France