The individual growth trajectories of 40 representative platelets are shown in Fig. . All platelets show similar growth kinetics and consistent final platelet area (∼1.12 µm 2 ) at the end of the recording (Fig. ). The area distributions of platelets collected at the end of insitu recording (Fig. ) were independent of the position of the platelet in the sample (Fig. ). These data confirm the ability of living CDSA to produce uniform assemblies with controlled size and demonstrate that the in-situ iSCAT imaging captures growth kinetics representative of the entire population.