1. Interleukin Genetics Inc. Waltham MA USA
2. Department of Periodontology University of North Carolina at Chapel Hill Chapel Hill NC USA
3. Faculty of Dentistry University of Chile Santiago Chile
4. Department of Periodontology Shanghai Stomatological Disease Center Shanghai China
5. Department of Dental Ecology University of North Carolina at Chapel Hill Chapel Hill NC USA
6. Shanghai BioAsia Institute of Life Science Shanghai China