Sheikh, Mahboobeh, and Pouya Ostadrahimi. “PREVALENCE OF CONGENITAL HEART DEFECTS IN IRANIAN CHILDREN WITH DOWN’S SYNDROME: A SYSTEMATIC REVIEW AND META-ANALYSIS”. International Journal of Pharmaceutical and Biological Science Archive 7, no. 6 (November 10, 2019). Accessed July 3, 2024. https://ijpba.in/index.php/ijpba/article/view/141.