Iles, Ray K, Nicolaides K, Pais RJ, Zmuidinaite R, Keshavarz S, Poon LCY, and Butler SA. 2019. “The Importance of Gestational Age in First Trimester, Maternal Urine MALDI-Tof MS Screening Tests for Down Syndrome”. Annals of Proteomics and Bioinformatics 3 (1):010-017. https://doi.org/10.29328/journal.apb.1001008.