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Cell Retention from 24 h to 48 h Under Flow, Relative to 24 h Static. Percent change in cell count per 400 μm × 400 μm unit pattern area relative to 24 h static seed, demonstrating surface cell retention. Average cell counts across patterned and PMMA surfaces were subtracted from 28 h static cell counts across all surfaces. Note: under static condition, patterning is non-directional on account of no flow. * indicates significant difference from the result on PMMA surface (p < 0.05).
