Intake and time dependence of blueberry flavonoid–induced improvements in vascular function: A randomized, controlled, double-blind, crossover intervention study with mechanistic insights into biological activity - Rodriguez-Mateos, A; Rendeiro, C; Bergillos-Meca, T; Tabatabaee, S; George, T W; Heiss, C; Spencer, J P (Am J Clin Nutr, 2013)