If I go into a coma and am put on life support, with no living immediate family and no one with medical directive authority, who decides if I live or die?

If I go into a coma and am put on life support, with no living immediate family and no one with medical directive authority, who decides if I live or die?
Asked by: Anna Gardiner from Falls Church, VA

Asked of U.S. Sen. Jim Webb (D-VA) on Sep 3rd, 2008

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