1. Department of Urology, Beijing Chao-yang Hospital, Capital Medical University, Beijing, PR China
2. Department of General Surgery, Guizhou Provincial Staff Hospital, Guiyang PR China
3. State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang PR China
4. The Key Laboratory of Chemistry for Natural Products, Guizhou Province and Chinese Academy of Science, Guiyang PR China