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Expression of cytokeratins, vimentin, and Hep‐Par1 antigen in developing human liver. (F) Expression of CK19 in infant liver (3 years old) and (G) adult liver (65 years old). In both livers, small oval epithelial cells expressing CK19 (arrows) are located in the limiting plate. Original magnification, ×1250. Reproduced with permission from Hepatology. 19 Copyright 1996, American Association for the Study of Liver Diseases.
