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Liver immunohistochemistry, 40× magnification (A–C) cluster of differentiation 3 (CD3) and (D–F) cytokeratin 7 (CK-7). Significantly higher CD3 staining was found with TPN. No differences in CK-7 staining of bile ducts were found. Histology scoring was performed, and a pairwise Mann–Whitney U test was conducted to determine p-value. All tests were two-sided, using a significance level of 0.05.
