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Identification of EECs by immunofluorescence staining for cytokeratin 19. (A) Optical micrograph image and (B) immunochemical staining with a rabbit anti-cytokeratin 19 antibody of EECs; (C) Immunofluorescence staining with DAPI dye and (D) a rabbit anti-cytokeratin 19 antibody to identify EECs. Original magnification: ×100.
