Andrographolide Isolated from Andrographis paniculata Induces Cell Cycle Arrest and Mitochondrial-Mediated Apoptosis in Human Leukemic HL-60 Cells - Cheung, Hon-Yeung; Cheung, Sau-Ha; Li, Jieliang; Cheung, Chui-Shan; Lai, Wai-Ping; Fong, Wang-Fun; Leung, Fo-Man (Planta Medica, 2005)