1. Department of Breast Surgery; First Affiliated Hospital of Zhejiang Chinese Medical University; Hangzhou 310006 P. R. China
2. College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou 310014 P. R. China
3. State Key Laboratory of Bioactive Substance and Function of Natural Medicines; Institute of Materia Medica; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100050 P. R. China