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. 2014 Sep 17;11:49. doi: 10.1186/s12989-014-0049-1

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© Braakhuis et al.; licensee BioMed Central Ltd. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Cell counts in the BALF of rats. The group exposed to 15 nm silver particles had an increased number of total cells (p = 0.06), neutrophils (p < 0.01), lymphocytes (p < 0.05) and monocytes (p < 0.01) compared to the control group at 24 hours after exposure. Compared to the group exposed to 410 nm silver particles, the increased numbers of total cells (p < 0.05), neutrophils (p < 0.01), lymphocytes (p < 0.05) and monocytes (p < 0.001) were also significant. The increased cell numbers returned to normal at 7 days after exposure.