In vitro study on the genotoxicity of dichloromethane extracts of valerian (DEV) in human endothelial ECV304 cells and the effect of vitamins E and C in attenuating the DEV-induced DNA damages - Hui-Lian, W; Dong-Fang, Z; Zhao-Feng, L; Yang, L; Qian-Rong, L; Yu-Zhen, W (Toxicol Appl Pharmacol, 2003)