Affandi MB, Tamaela L, Talogo RW. Prevalence of Heart Disease of Elementary Schoolchildren in a Well-To-Do Population Group, Jakarta 1973. PI [Internet]. 2017Jun.16 [cited 2025Apr.20];19(1-2):41-6. Available from: https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/1526