Glucuronidated and sulfated metabolites of the flavonoid quercetin prevent endothelial dysfunction but lack direct vasorelaxant effects in rat aorta - Lodi, F; Jimenez, R; Moreno, L; Kroon, P A; Needs, P W; Hughes, D A; Santos-Buelga, C; Gonzalez-Paramas, A; Cogolludo, A; Lopez-Sepulveda, R; Duarte, J; Perez-Vizcaino, F (Atherosclerosis, 2009)