Icarifil, a Natural Mixture Based on L-Citrulline and L-Carnitine as a Novel Multicomponent Nutraceutical to Modulate ROS and PDE5 oleh Chiara Amante, Chiara De Soricellis, Gianni Luccheo, Anna Di Vernieri, Luigi Luccheo, Giovanni Falcone, Pasquale Del Gaudio