Metabolism and Pharmacokinetics of Anthraquinones in Rheum palmatum in Rats and ex vivo Antioxidant Activity - Shia, Chi-Sheng; Juang, Shin-Hun; Tsai, Shang-Yuan; Chang, Pei-Hua; Kuo, Sheng-Chu; Hou, Yu-Chi; Chao, Pei-Dawn Lee (Planta Medica, 2009)