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Histologic images of inflammatory cell infiltration (lymphocytes, plasma cells, polymorphonuclear leukocytes and macrophages) at the end of implanted MTA+NS tubes: A and B) Grade 3 inflammation was observed at 7- and 15-day intervals; C) Grade 2 inflammation was observed at 30-day samples; D and E) Grade 1 inflammation was observed at 60- and 90-day intervals (Hematoxylin-Eosin staining) (Original magnification 400×)
