1. Chongqing key Laboratory for Oral Diseases and Biomedical Sciences, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, P.R. China
2. Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
3. Department of Physiological Sciences and Molecular Biology, Fukuoka Dental College, Fukuoka, Japan