1. School of Pharmacy, Guangxi Medical University, Nanning, P. R. China
2. State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, P. R. China
3. School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, P. R. China
4. Department of Stomatology, The Fifth Medical Center of PLA General Hospital, Beijing, P. R. China