1. Modern Research Center for Traditional Chinese Medicine, School of Chinese Materia Medica Beijing University of Chinese Medicine Beijing 100029 P. R. China
2. Alashan Mongolian Hospital, Alxa Left Banner Inner Mongolia 750306 P. R. China
3. State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing 100700 P. R. China