1. College of Pharmacy; Ningxia Medical University; Yinchuan Ningxia P. R. China
2. Ningxia Research Centre of Modern Hui Medicine Engineering and Technology; Ningxia Medical University; Yinchuan P. R. China
3. Key Laboratory of Hui Ethnic Medicine Modernisation, Ministry of Education; Ningxia Medical University; Yinchuan P. R. China
4. Faculty of Pharmaceutical Sciences; Toho University; Funabashi Chiba Japan