"Euthanasia is a treatment like any other, the difference is that it's a final treatment," argues Marc Decroly, a doctor who has helped more than a hundred patients end their lives. Decroly, a 58-year-old general practitioner, is one of several doctors in Belgium who help people end their lives at home under a right-to-die law the country adopted 20 years ago, on May 28, 2002. At the time, Belgium was only the second country in the world to decriminalise euthanasia, two months after its neighbour the Netherlands. In the ensuing two decades, the procedure - once furiously contested - has become largely accepted. An anti-euthanasia protest held in Brussels a month ago rallied only around 350 people. Video: AFP Decroly said that "no one can oppose the wish of the patient" if the law's conditions are met. Only those with an incurable illness and experiencing constant and intolerable physical or mental suffering that cannot be alleviated qualified. Their clear request has to be expressly repeated, fully thought through and not subject to any outside pressure. Decroly said he only went ahead with it if a second doctor endorsed it. "Euthanasia is never easy. But it's the endpoint of a...