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. 2019 Nov 1;9:15867. doi: 10.1038/s41598-019-52416-x

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Stability of expression of eight candidate reference genes in three different intra-mammalian life stages of F. hepatica. Stability values were obtained for NEJs, 4 week-old immature, and 12 week-old adult worms using NormFinder (A), geNorm (B), BestKeeper (C), and the comparative ΔCT method (D). Genes were ranked from the least stable (on the left) to the most stable (on the right).