It's here, at least in the UK:
Per the article, apparently children are also subject to this treatment. There is an ongoing investigation into this practice.
At the risk of being subject to Godwin's Law, it's worth revisiting Bishop Clemens von Galen, an outspoken opponent of the Third Reich's policy of euthenasia. What he describes is at the bottom of the slope.
"These are people, our brothers and sisters; maybe their life is unproductive, but productivity is not a justification for killing."