After paraffin removal and rehydration, sections were either stained with hematoxylin and eosin for histological analysis or treated with 0.3% H2O2 for immunohistochemistry. Slides were processed as described [22 (link)] for antigen retrieval, permeabilization, blocking, and antibody staining (listed in Supplementary Table S1). For both histology and immunohistochemistry, slides were mounted in Dako aqueous Medium (Agilent Technologies, Santa Clara, CA, USA) and scanned with the panoramic P250 digital slide scanner (3DHistech, Budapest, Hungary).
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