Schielen, PCJIrivmvan Leeuwen-Spruijt, MBelmouden, IElvers, LHrivmJonker, MLoeber, JGrivm2025-03-182025-03-1820061675243510.1002/pd.1486https://rivm.openrepository.com/handle/10029/641661Multi-centre first-trimester screening for Down syndrome in the Netherlands in routine clinical practiceArticlePrenat Diagn 2006; 26(8):711-82025-03-18