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Serial staining of IL-6 and PNAd in salivary glands of a pSS patient. IL-6 and PNAd stainings of pSS glands were performed as serial immunohistochemistry to detect possible colocalisation. The same structures in the two sections are marked as * and **. Colocalisations of IL-6 and PNAd are marked with numbers from 1 to 7. Most of HEVs expressed IL-6.
