Arterial stiffness in hypertensive patients according to metabolic syndrome score - Pietri, P.; Vyssoulis, G; Karpanou, E; Vlachopoulos, C.; Adamopoulos, D; Kyvelou, S-M; Spanos, P; Cokkinos, D; Stefanadis, C. (JOURNAL OF HYPERTENSION, 2007)