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MSCs within micropillars for 3 weeks. MSCs in micropillar arrays with spacings of (A) 5 μm, (B) 10 μm, (C) 20 μm, or (D) 50 μm. (E) MSC density after 3 weeks. In (A–D), cells were fixed and stained for actin (green) and the nucleus (blue). Scale bars represent 50 μm. In (E) dot plots report mean ± SEM. **p < 0.005. Each dot indicates one analyzed image.
