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Effects of a hydro-alcoholic extract of fenugreek (HAEF) and thalidomide on the length of the vascular tubes formed by human umbilical vein endothelial cells (HUVECs) in collagen gels. Data are presented as mean ± SEM and calculated from three independent experiments. **P < 0.01 and ***P < 0.001 versus control group (0 µM).
