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Indran IR, Lee BH, Yong EL.Indran IR, et al. Among authors: yong el.Best Pract Res Clin Obstet Gynaecol. 2016 Nov;37:12-24. doi: 10.1016/j.bpobgyn.2016.03.006. Epub 2016 Apr 1.Best Pract Res Clin Obstet Gynaecol. 2016.PMID: 27118251Review.