Euthanasia is the practice of intentionally ending a life in order to relieve pain and suffering. There are different euthanasia laws in each country. The British House of Lords Select Committee on Medical Ethics defines euthanasia as "a deliberate intervention undertaken with the express intention of ending a life, to relieve intractable suffering". In the Netherlands and Flanders, euthanasia is understood as "termination of life by a doctor at the request of a patient". Euthanasia is categorized in different ways, which include voluntary, non-voluntary, or involuntary. Voluntary euthanasia is legal in some countries, U.S. states, and Canadian Provinces. Non-voluntary euthanasia is illegal in all countries. Involuntary euthanasia is usually considered murder. As of 2006, euthanasia is the most active area of research in contemporary bioethics.