Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
심실중격의 결함은 심장병의 원인이 될 수 있습니다.simsiljunggyeog-ui gyeolham-eun simjangbyeong-ui wonin-i doel su issseubnida.A defect in the ventricular septum can be a cause of heart disease.