Pulse Wave Analysis (PWA) Applanation tonometry using the SphygmoCor® system (Atcor Medical, West Ryde, Australia) will be performed to measure variables of arterial stiffness. For PWA, the tonometer will be applied to the radial artery of the non-dominant arm. The SphygmoCor® system will calculate the Augmentation index (AIx) from the pulse waves.