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Cryosections stained with hematoxylin and eosin under phase-contrast microscopy (magnification, ×20). (A) Group 1, epithelium is fully recovered and the stroma is compact; (B) group 2, epithelium is recovered, however, new vessels are observed and stroma is swollen; (C) group 3, epithelium is not fully recovered and severe stromal edema is observed.
