Erum Afzal, Muhammad Sohail Arshad, Waqas Imran Khan. “Frequency of Thyroid Dysfunction and Congenital Heart Defects in Subjects With Down Syndrome”. Journal of Rawalpindi Medical College 25, no. 2 (June 30, 2021). Accessed December 9, 2025. https://journalrmc.com/index.php/JRMC/article/view/1560.