Pulse Waveform Analysis: Central aortic pressure and pulse pressure will be measured using applanation tonometry). Augmentation index will be measured using applanation tonometry and Endo-PAT. CAP, PP and AIx can be measured non-invasively using radial or carotid applanation tonometry (and Endo-PAT for AIx), calibrated by the peripheral diastolic and mean arterial pressure. Both the NIHem system and the SphygmoCor device were used.