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Engraftment of transplanted epidermal cell sheets (ECSs). a PKH-labeled cells were observed in ulcer sites after endoscopic balloon dilation (EBD). Scale bar indicates 50 μm (red, PKH; blue, DAPI). b Colonies of epithelial cells (red) were observed in ulcer sites after EBD. Scale bar indicates 50 μm (red, pan-CK; blue, DAPI).
