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Analysis of spheroid diameters of A) A549, B) HepG2, C) Caco‐2 and D) NHDF spheroids at different initial seeding densities after 3 d postseeding under continuous perfusion in the microfluidic spheroid array device, n = 6–9 ± SD. Statistical analysis was performed using mixed‐effects analysis (*p < 0.0332, **p < 0.0021, ***p < 0.0002, ****p < 0.0001).
