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. 2007 Aug 15;2(8):e733. doi: 10.1371/journal.pone.0000733

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Thakur et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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C57BL/6 mice were i.n. infected with 5×10⁴ PFU. At day 17 after infection, spleens were harvested and the spleen weight was determined. Shown are means±SD of the number of mice indicated in brackets. The asterisks indicate a statistically significant difference (p = 0.0001 for parental virus vs. Delta 40 bp mutant and p = 0.011 for parental virus vs. 40 bp low mutant; Student's t-test).