1. Yonsei University College of Dentistry, Oral Science Research Institute, Department of Preventive Dentistry and Public Oral Health, BK21 PLUS Project, 50 Yonsei-ro, Seoul 03722, Republic of Korea
2. Yonsei University College of Dentistry, Department of Orofacial Pain and Oral medicine, 50 Yonsei-ro, Seoul 03722, Republic of Korea