 The Ultrasound Reading Center has wide experience in centralized reading of studies on LV hypertrophy and function as well as in studies on arterial structure and has been involved in a number of international multicenter trials 35,40. The Reading Center is provided of 4 work stations for echocardiographic reading and 2 for carotid ultrasound, with high level of security for preservation of data and privacy. All echocardiograms will be classified with a reception number which will join the recruitment number of the participant every participants will have 2 identification numbers in addition to the number of identification document. 