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Figure 2 Graphs showing the numbers per square millimeter of mast cells and T lymphocytes (upper panel) and the percentages of immunostained macrophage and smooth muscle cell areas (lower panel) in the atherectomy specimens of each group (group 1: chronic stable angina; group 2: unstable angina, Braunwald’s classes I and II; and group 3: unstable angina pectoris in patients requiring intravenous treatment with nitrates and heparin, Braunwald’s class III). Individual data points, means and p values are shown.