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. 2003 Oct;89(10):1169–1173. doi: 10.1136/heart.89.10.1169

Figure 4.

Figure 4

Effect of treatments on peak respiratory exchange ratio (RER) in patients (solid circles) and controls (solid circles). **p < 0.02; *p < 0.05 for patients and controls. a, α blocker; b, β blocker; a+b, α and β blocker; p, double placebo.