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A plot of the cumulative normal distribution function versus dimensionless focused flow diameter, , in the microfluidic channel driven by hydrostatic pressure (blue dashed lines) and syringe pumps (red solid lines). The four sets of data correspond to averaged focused flow widths, = 0.075, 0.100, 0.140, and 0.197 (from left to right). Hydrostatic-controlled flows show consistently narrower distributions of the focused width, , compared to the focused flow generated by syringe pumps.
