An ent-Kaurene Diterpene Enhances Apoptosis Induced by Tumor Necrosis Factor in Human Leukemia Cells - Suzuki, Ikue; Kondoh, Masuo; Harada, Motoki; Koizumi, Naoya; Fujii, Makiko; Nagashima, Fumihiro; Asakawa, Yoshinori; Watanabe, Yoshiteru (Planta Medica, 2004)