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Figure 4 Effect of fibrous cap thickness (a, 90 µm; b, 80 µm; c, 40 µm) on stress distribution. When the fibrous cap was thinner than 80 µm, the stress was markedly elevated (arrow). (Aa, Ab, Ac) Plaque models used. (Ba, Bb, Bc) Mapping of stress distribution of the corresponded model.