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. 2017 Feb 13;12(2):e0172163. doi: 10.1371/journal.pone.0172163

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© 2017 Necchi 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 credited.

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Fig 3 — HI standard reference serum against S. flexneri 2a (A and B) and S. flexneri 3a (C and D) was tested by L-SBA (A and C, respectively) and by the conventional assay (B and D, respectively) in three independent experiments. Black lines represent the curve fitting by nonlinear regression for each replicate.