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. 2018 Jan 1;8(1):13–30. doi: 10.7150/thno.21089

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Expression of MMP9 in PDAC tissue: MMP9 (reddish-brown staining) is found in PMN and in spindle shaped cells (the latter indicated by arrows) in PDAC tissue with high PMN infiltrates (A), but not in tissue with low numbers of PMN (B).