Hearing of the Committee on Health, Education, Labor, and Pensions, United States Senate, One Hundred Ninth Congress, First Session, on Examining Health Care Provided to Non-ambulatory Persons, Focussing [sic] on the Medical, Scientific, and Ethical Issues Involved in the Diagnosis, Treatment, and Decision-making for Patients with Disorders of Consciousness Resulting from Severe Brain Damage, April 6, 2005