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Light-microscope evaluation of pigskin samples in group C (A); for irradiation by the CO2 fractional pulsed laser directly (group L) (B); and for laser irradiation combined with saline (group L + S) (C) and tenfold-diluted MBs (group L + MBs) (D); (E) Quantification of the penetration depths of Evans blue in panels (A–D) (** p < 0.01). Data are mean and SD values.
