P.082 BENEFICIAL EFFECT OF LAUGHTER ON ARTERIAL STIFFNESS AND WAVE REFLECTIONS: THE ROLE OF INFLAMMATION, ENDOTHELIAL FUNCTION AND OXIDATIVE STATUS - P. Xaplanteris; C. Vlachopoulos; K. Baou; C. Vasiliadou; I. Dima; C. Stefanadis (Artery Research, 2007)