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Figure 3 Median N-terminal fragment of ANP pro-hormone (NT-pro-ANP) levels in patients with no (open circles), mild-to-moderate (black triangles), and severe (black squares) ischemia, in whom samples were available at all three time points (baseline, immediately [Immed] after stress testing, and 4 h after stress testing). The p values are for trend across ischemic categories at each time point. IQR = interquartile range; Mod = moderate.