Somsri, S. (2021) “Down Syndrome Screening Outcomes in Advanced Maternal Age Pregnant Women at Roi Et Hospital ”, Srinagarind Medical Journal, 36(5), pp. 513–521. available at: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/252550 (accessed: 15 September 2026).