Critics warn move could have devastating impact on lives and wellbeing of those affected
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I’m sure there are established methods for studying interventions in people who are mentally ill or suicidal.
I’m sure there are! I’m asking you what you consider to be a measure for “high quality” evidence
That’s a very strange argument you are trying to build, it does not matter what random individuals think online. The standards for high quality evidence are already well established in medicine. You can argue with those bodies if you disagree. Write a paper perhaps?