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Figure 4 Percentages of immunostained smooth muscle cell areas and macrophage areas and number of T-lymphocytes/mm² in restenotic coronary lesions underlying stable angina (CCS 1–3) and unstable angina (Braunwald I–III). Data are expressed as mean ± SD. CCS = Canadian Cardiovascular Society. Open bar = stable angina; closed bar = unstable angina.