References in classic literature ?
I did this, as I must have felt then, at some personal risk of a supernatural kind, for my studies were apt to be prolonged into the night after the rest of the family had gone to bed, and a certain ghost, which I had every reason to fear, might very well have visited the small room given me to write in.
I want my life to be prolonged and I want life-sustaining treatment to be provided or continued unless I am in a coma that my attending physician believes to be irreversible.
I want my life to be prolonged to the greatest extent possible without regard to my condition, the chances I have for recovery, or the cost of the procedures.