Metabolomics Analysis of Amniotic Fluid in Euploid Foetuses with Thickened Nuchal Translucency by Gas Chromatography-Mass Spectrometry oleh Federica Murgia, Giovanni Monni, Valentina Corda, Aran J. Hendren, Giulia Paci, Alba Piras, Rosa M. Ibba, Luigi Atzori