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Figure 3 Representative coronary angiograms from patients in the non-GTN group (left) and in the GTN group (right). Angiograms were obtained at the time of the morning control (control), during acetycholine 10–4 mol/liter in the morning (AM Ach–4), and acetylcholine 10–4 mol/liter at the time of the afternoon study (PM Ach–4).
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