Implication of Cyclic Nucleotide Phosphodiesterase Inhibition in the Vasorelaxant Activity of the Citrus-Fruits Flavonoid (±)-Naringenin - Orallo, Francisco; Camiña, Mercedes; Álvarez, Ezequiel; Basaran, Hélène; Lugnier, Claire (Planta Medica, 2005)