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. 2020 Jul 21;10:12018. doi: 10.1038/s41598-020-68329-z

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© The Author(s) 2020

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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Longitudinal measurements of cervicovaginal HNE concentrations in women at high risk of spontaneous preterm birth who deliver spontaneously prior to 37 weeks of gestation (n = 281 term, n = 64 preterm) (A) and women who subsequently develop a short cervix (n = 62 short, n = 198 not short) (B). Geometric means and SE bars. Figure prepared using StataCorp. 2015. Stata Statistical Software: Release 14. College Station, TX: StataCorp LP.