Before revision: Aging is not a scientifically recognized cause of death; It is considered that there is always a more direct cause , although it may be unknown in certain cases and could be one of a number of aging-associated diseases .
After revision: Aging is not a scientifically recognized cause of death; it is currently considered that there is always a more direct cause () although it may be unknown in certain cases and could be one of a number of aging-associated diseases .