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Untreated porcine skin, autofluorescence and SHG images of non-flat intermediate regions between epidermis and dermis. The images have been captured about 80 μm under the surface, with two different excitation wavelengths: 900 nm (A) and 1100 nm (B). In (A) SHG falls in the blue channel, while in (B) SHG falls in the green channel.
