1. Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu, P. R. China
2. Department of Pathology and Microbiology, Center of Infection and Immunology, Hong Kong University, Hong Kong, China
3. Division of Rheumatology, Medical University of South Carolina, Charleston, SC, USA
4. Mucosal Immunology Unit, Oral Infection and Immunity Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
5. Center for Craniofacial Molecular Biology, University of Sothern California School of Dentistry, Los Angeles, CA, USA