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Microfluidic enrichment for single-cell analysis. Inertial focusing, label-free capture of single cancer cells using a microfluidic device (25). (Top) Hydrodynamic focusing of cell flow (A549 lung adenocarcinoma) by sheath flow (glycerol). (Bottom) Bright-field and immunofluorescent images of isolated single A549 cells. (Scale bar, 100 μm.)
