1. Department of Oral Pathology, National Clinical Research Center for Oral Diseases, Peking University School and Hospital of Stomatology, Beijing, China
2. Department of Oral Pathology, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Labor
3. Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
4. Peking University School and Hospital of Stomatology