Inhibitory Effect of Human Breast Cancer Cell Proliferation via p21-Mediated G1 Cell Cycle Arrest by Araliadiol Isolated from Aralia cordata Thunb. - Cheng, Wen-Ling; Lin, Ting-Yu; Tseng, Yen-Hsueh; Chu, Fang-Hua; Chueh, Pin-Ju; Kuo, Yueh-Hsiung; Wang, Sheng-Yang (Planta Medica, 2011)