1. Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Four Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
2. Department of Oral Biochemistry, School of Dentistry, Jeonbuk National University, Jeonju, Republic of Korea
3. Center for Immunology and Infectious Diseases; Departments of Medicine and of Microbiology and Immunology, School of Medicine; University of California Davis, Davis, CA, USA
4. Affiliated Stomatology Hospital of Guangzhou Medical University, Guangdong Engineering Research Center of Oral Restoration and Reconstruction, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, Guangdong, China