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
혈전은 혈관을 막아 심장마비를 일으킬 수 있습니다.Hyeoljeoneun hyeolgwan-eul mak-a simjangmabi-reul ilheukil su issseubnida.A thrombus can block blood vessels and cause a heart attack.