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Average stiffness measurements of substrates. The average stiffness and standard error mean from AFM measurements of complete coatings of matrigel (n = 5 samples), fibronectin (n = 6 samples), cell monolayer (n = 4 samples), and cell monolayer coated with fibronectin (n = 4 samples). *p < 0.05. AFM, atomic force microscopy.
