1. Department of Stomatology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
2. Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
3. Department of Stomatology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
4. Department of Maxillofacial Surgery, Qingdao Stomatological Hospital Affiliated to Qingdao University, Qingdao, China.
5. Department of Stomatology, Yuquan Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China.
6. Second Outpatient Department of Peking University School of Stomatology, Beijing, China.