1. Department of Oral Microbiology and Immunology; Dental Research Institute and BK21 Program; School of Dentistry; Seoul National University; Seoul; Korea
2. Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences; Seoul National University; Seoul; Korea
3. Division of Mass Spectrometry Research; Korea Basic Science Institute; Ochang; Korea
4. Department of Conservative Dentistry and Dental Research Institute; School of Dentistry; Seoul National University; Seoul; Korea