PISTORIUS, L; CLUVER, C A; BHORAT, I; GEERTS, L. Trisomy 21 screening with αlpha software and the Fetal Medicine Foundation algorithm. South African Medical Journal, South Africa, v. 113, n. 11, p. 27–34, 2023. DOI: 10.7196/SAMJ.2023.v113i11.885. Disponível em: https://samajournals.co.za/index.php/samj/article/view/885. Acesso em: 28 jan. 2026.