In Vitro Inhibitory Effect of Protopanaxadiol Ginsenosides on Tumor Necrosis Factor (TNF)-α Production and its Modulation by Known TNF-α Antagonists - Cho, Jae Youl; Yoo, Eun Sook; Baik, Kyong Up; Park, Myung Hwan; Han, Byung Hoon (Planta Medica, 2001)