Astragaloside IV Dilates Aortic Vessels from Normal and Spontaneously Hypertensive Rats through Endothelium-Dependent and Endothelium-Independent Ways - Zhang, Wei-Dong; Zhang, Chuan; Wang, Xu-Hui; Gao, Ping-Jin; Zhu, Ding-Liang; Chen, Hong; Liu, Run-Hui; Li, Hui-Liang (Planta Medica, 2006)