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. 2015 Mar 23;10(3):e0118678. doi: 10.1371/journal.pone.0118678

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© 2015 Saint-Marcoux 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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Fig 3 — Estimation was done by calculating the pairwise variation (V_n/n+1) of the normalization factors NF_n and NF_n+1 as described in Vandesomple et al., [16].