1. Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, PR China.
2. Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, Beijing, PR China; Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences & Comparative Medicine Centre, Peking Union Medical College, Beijing, PR China.
3. Department of Dental Materials, Peking University School and Hospital of Stomatology, Beijing, PR China.
4. Department of Oral Implantology, Peking University School and Hospital of Stomatology, Beijing, PR China.
5. Department of Oral Pathology, Peking University School and Hospital of Stomatology, Beijing, PR China.