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Figure 1 Upper panel: representative immunohistochemical staining for CD45, CD3, and CD20 expression in a control liver specimen. Positive staining is shown in all areas of the liver. Lower panel: representative immunohistochemical staining for the same markers in biopsies from paediatric patients: CD45 (PAH 1); CD3 and CD20 (PAH 9). CD45 and CD3 localise to portal tracts and liver parenchyma, positive CD20 staining shows a portal pattern of distribution.
