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Shennan A, Suff N, Leigh Simpson J, Jacobsson B, Mol BW, Grobman WA; FIGO Working Group for Preterm Birth.Shennan A, et al. Among authors: jacobsson b.Int J Gynaecol Obstet. 2021 Oct;155(1):16-18. doi: 10.1002/ijgo.13852.Int J Gynaecol Obstet. 2021.PMID: 34520058Free PMC article.