1. School of Information Science and Engineering, Shenyang Ligong University, Shenyang, China
2. Department of Information and Communication System, Hohai University, Changzhou, China
3. Department of Periodontology, Peking University and Hospital of Stomatology, Beijing, China
4. Department of Gynecology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, China