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Figure 3 A representative case of B-mode ultrasound image on brachial artery at baseline (left) and after 5 min ultrasound exposure (right). Brachial artery diameter was measured off-line after the procedure by the Vericis Echo Review application (Camtronics Medical Systems, Hartland, Wisconsin) using a semiautomatic quantitative analysis system (3.938 mm at baseline and 4.567 mm after ultrasound exposure). *p < 0.001, mean ± SEM (mm), n = 20.