Chawanpaiboon, S. (2007) “Prenatal Serum and Ultrasound Screening for Downûs Syndrome”, Siriraj Medical Journal, 59(6), pp. 341–317. available at: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246239 (accessed: 30 September 2026).