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(A) Cascade blue–10 kDa and TRITC–70 kDa dextran at 10 μM were injected in the left microchannel and confocal images are shown after 4 hours. Fluorescent 10 kDa and 40 kDa diffusion profile is compared at 5 min (B), 60 min (C) and 4 hours (D) post-injection.
