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Mean velocities of L-selectin microspheres (a—c) or of unfixed or fixed neutrophils (d—f) rolling on PSGL-1 in the absence or presence of 6% Ficoll (which increased the viscosity by 2.6 fold) were measured as described in Fig. 1c legend and plotted against wall shear rate (a and d), wall shear stress (b and e), and tether force (c and f). Reproduced from Yago et al.20
