(Updated to correct blog info, 1/17/2005
The Jehovah's Witnesses have established semi-secretive Hospital Liaison Committees to represent incapacitated members' wishes (and the wishes of their parent organization, the Watchtower Bible and Tract Society) to the medical community.
I have written a letter incorporating a brief discussion about how this practice constitutes, in part
Forum:
Coercive Persuasion and Undue Influence