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(a) to (d) OCM imaging of squamous cellular progression in depth. Decrease in cell size and increased relative nuclear-to-cytoplasm ratio is evident in the images. Image depths for (a) to (d) are 30 μm, 90 μm, 180 μm, and 210 μm, respectively. Scale bars, 100 μm. (e) to (h) Zoom views (3×) of the regions highlighted in (a) to (d). Scale bars, 20 μm.
