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Figure 3 The augmentation index (corrected for changes in heart rate) and subendocardial viability index (SVI) response during the study. Each line represents response defined as net caffeine and smoking effect minus placebo and sham smoking effect (diamonds) or net smoking effect minus sham smoking effect (rectangles) at each time point. The p values on the graphs refer to the interaction between caffeine and smoking. Error bars = SEM.
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