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Polar plots for cells on flat or vertical grooves. Cells were exposed to an EF for 1 h. Radius 50 μm/h. The numbers indicate the % of cells in each segment. ns = not significant; (a) p < 0.05; (b) p < 0.02; (d) p < 0.002; (e) p < 0.001. Reprinted with permission from Elsevier Publishers Ltd: Development Biology, copyright (2016).
