Lekakis JP, Papathanassiou S, Papaioannou TG, Papamichael CM, Zakopoulos N, Kotsis V, Dagre AG, Stamatelopoulos K, Protogerou A, Stamatelopoulos SF. Oral L-arginine improves endothelial dysfunction in patients with essential hypertension. International Journal of Cardiology [Internet]. 2002;86(2-3):317 - 323.