1 State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, PR China.
2 Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu 610041, PR China.
3 Department of Pharmaceutics and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China.
4 State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, PR China. Electronic address: baiding@scu.edu.cn.
5 Department of Pharmaceutics and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China. Electronic address: lidefu@scu.edu.cn.