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Figure 2 Effects of hypercholesterolemia in rabbits receiving (Chol+vit D₂) or not receiving (Chol) daily supplements of vitamin D₂ on aortic valve function, as assessed by echocardiography. The aortic valve area (AVA) (left column), indexed AVA (arbitrary units [AU]) (middle column), and maximal gradient (mm Hg) (right column) were calculated as described in the Methods section and are represented for each individual rabbit. ns = not significant.