1 Department of Orthodontics, School of Dentistry, Kyung Hee University, No. 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
2 Advanced Analysis Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 136-791, Republic of Korea.
3 Laboratory of Immune Regulation and Tissue Engineering (LITE), Division of Periodontology, Diagnostic Sciences & Dental Hygiene, Ostrow School of Dentistry, University of Southern California, 925 34th Street, Room 4278, Los Angeles, CA 90089-0641, USA.
4 Department of Orthodontic and Craniofacial Dentistry, The Chang Gung University, Taipei, Taiwan.