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Immunohistochemical staining of SPRY1 protein in human oral potentially malignant disorders (OPMDs) with and without malignant transformation (MT). Representative stronger immunohistochemical staining of SPRY1 protein in a human OPMD with MT (A, ×100) and weaker staining of SPRY1 protein in a human OPMD without MT (B, ×100).
