He Y, Wang Y, Li Z, Chen H, et al. Clinical performance of non-invasive prenatal testing for trisomies 21, 18 and 13 in twin pregnanciesa cohort study and a systematic meta-analysis. Acta Obstet Gynecol Scand 2020 Mar 12. doi: 10.1111/aogs.13842.
PMID: 32166736