1. Department of Microbiology, The Forsyth Institute, Cambridge, Massachusetts, USA
2. Microbial Sciences Institute, Yale University, New Haven, Connecticut, USA
3. Capital University of Medicine, Beijing, China
4. Department of Microbiology, Army Medical University, Chongqing, China
5. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA
6. Section of Biosystems and Function, UCLA School of Dentistry, Los Angeles, California, USA
7. Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
8. Department of Periodontics, University of Washington, Seattle, Washington, USA