그리고 초기에는, 이 아이들이 유아 돌연사로 죽었다고 여겨졌습니다. 더 정확히 말하면 유아 돌연사 증후군이죠.
And initially, it was thought that they died of what's known informally as "cot death," and more formally as "Sudden Infant Death Syndrome."