MCW HealthLink: A look at coma and persistent vegetative state. Includes a discussion on treatments and prognosis.NINDS Information Page: Coma and persistent vegetative state data compiled by The National Institute of Neurological Disorders and Stroke.Responding to Patients in the Persistent Vegetative State - An Ethical and Legal Dilemma.: This article was published in Philosophia Christi 19.2 (Fall 1996): 55-83. This journal is a publication of the Evangelical Philosophical Society.World Medical Association: WMA policy: Statement on persistent vegetative state. Includes a definition, recovery and guidelines.