1. Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, P.R. China
2. Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
3. Department of Biology and Pharmaceutical Technology, Ningxia Vocational and Technical College, Yinchuan, P.R. China