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Figure 5 IL-2 levels were similar in unstable and stable angina on admission, but showed a significant and transient increase at sample 2 only in group A (p < 0.001 vs. samples 1 and 3). Such a time variation was absent in groups B. The x-axis represents the time of sampling: 1 = admission; 2 = after 7 to 15 days; 3 = after 6 months; A1 = resolving UA, n = 19; A2 = refractory UA, n = 16; B1 = stable angina, Canadian class I to II, n = 20; B2 = stable angina, Canadian class III to IV, n = 15.