Paraffin-embedded samples were sectioned at 5 µm. The sectioned samples were deparaffinized, rehydrated, and stained with Mayer’s hematoxylin solution (131-09665; Wako Pure Chemical Industries) at RT for 5 min and 1% eosin Y solution (051-06515; Wako Pure Chemical Industries) at RT for 2 min. After washing, the samples were mounted with Softmount (192-16301; Wako Pure Chemical Industries). Images of sample were visualized using BZ-810 (Keyence, Osaka, Japan) and analyzed with BZ-800 analyzer software (Keyence).
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