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COMSOL simulation results contrasting the vertical concentration profile through microbubble and rectilinear wells as a function of well depth (y-position = 0 corresponds to the well opening) for three aspect ratios (A). Graphical representation of the concentration of soluble factors at steady state for rectilinear and microbubble wells with aspect ratios 0.5 (B and C, respectively) and aspect ratio 3.0 (D and E, respectively).
