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Figure 2 Effect of valsartan (n = 50) and amlodipine (n = 50) on left ventricular mass index (LVMI). The open circles on the vertical bars represent the mean value ± SD. p < 0.01 for baseline versus six months later in the valsartan group; p < 0.01 for baseline versus six months later in the amlodipine group.