1. State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu China
2. Department of Periodontology and Implantology Stomatological Hospital Southern Medical University Guangzhou China
3. Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu China
4. Department of Biomedical Engineering Tufts University Medford MA USA