ZHANG Wei-Wei, SUN Qi-Xin, LIU Yin-Hui, GAO Wei, LI Yan-Hai, LU Kun, WANG Zhuo. Chronic administration of Liu Wei Dihuang protects rat's brain against D-galactose-induced impairment of cholinergic system.. Acta Physiol Sin 2011; 63 (3): 255 (in Chinese with English abstract).